On a sunny Saturday afternoon, Kofi, who owns a quaint bookstore in a busy neighborhood, arranged a book club meeting at a nearby cafe. Several regulars, including Priya, Emeka, and Yuna, are enthusiastic members of the book club. In preparation for the event, Kofi had to pick up the chosen book from his store, but he forgot and left it behind. Realizing his mistake on arriving at the cafe, he promptly called his assistant, Mika, who was still at the bookstore, and asked her to bring the book to the cafe. Mika agreed to deliver the book after she finished restocking the shelves, an errand that should take about 30 minutes.

Meanwhile, Priya, who was running late to the club due to a prior engagement, decided to drop by the bookstore to grab a coffee from the adjacent cafe and grab her own copy of the book, not knowing that Kofi had forgotten his. As she entered the bookstore, she overheard Kofi's conversation with Mika about bringing the book to the cafe. Priya then headed to the coffee shop, grabbed her drink, and reached the book club's meeting without stopping by the bookstand where the chosen books were prominently displayed. She assumed that Kofi would have the situation under control and didn't consider picking up an extra book.

Emeka, who is a friend of both Kofi and Mika, rather than going straight to the cafe, took a scenic route, passing by the bookstore and noticed Mika restocking shelves. He was unaware that Mika was supposed to deliver a book to Kofi at the cafe afterward. Observing the bookstore's activity, Emeka continued on his way without engaging Mika in conversation, under the impression that the bookstore was operating as per usual.

Yuna, who lives closest to the cafe, arrived early and was present when Kofi discovered he'd left the book behind and heard him call Mika. Yuna expected to see Mika arrive with the book soon. However, on receiving a text message about an urgent matter from home, Yuna had to leave the cafe, missing Mika's arrival with the book.

Given this complex scenario, who is aware that Kofi forgot the book and relied on Mika to bring it to the cafe, and who possesses knowledge about Mika's task of restocking before delivering the book? Furthermore, who knows about Priya's late arrival and her visit to the bookstore, and what is each person's level of information regarding the book's availability at the book club meeting?
Kofi is fully aware that he forgot the book because he was the one who made the mistake. Once he realized this, he called Mika to resolve the issue, so he also knows that Mika is expected to bring the book to the cafe after completing her restocking task. However, Kofi does not know about Priya's visit to the bookstore or the coffee shop, as he was already at the cafe when Priya dropped by the bookstore. Neither did he see Priya's late arrival to the cafe or her carrying a copy of the book since she didn't pick up an extra.

Mika knows she is supposed to bring the book to the cafe after she finishes restocking the shelves because Kofi instructed her to do so. But since Priya overheard the conversation and did not interact with Mika, Mika remains unaware of Priya's visit to the bookstore and of her prior engagement that caused her to be late to the book club meeting.

Priya knows about Kofi's forgetfulness because she overheard his phone conversation with Mika at the bookstore. She also knows that Mika is tasked with bringing the book to the cafe since she heard the whole conversation. However, Priya does not know that Mika has to finish restocking shelves before delivering the book, as that detail was discussed before she arrived at the bookstore. Since none of the other characters observed Priya's visit to the bookstore and she didn't speak to anyone about her lateness or her assumptions regarding the book, none of them know about her late arrival and visit to the bookstore.

Emeka is unaware of the book-related issues altogether. He observed Mika restocking the shelves in the bookstore, but since he didn't speak to her and wasn't privy to Kofi's phone conversation, he does not know that Mika is supposed to bring the book to the cafe and certainly doesn't know about Kofi forgetting the book. Additionally, as he did not see Priya at the bookstore or the cafe, he is also oblivious to her late arrival and the reason for it.

Yuna is aware that Kofi forgot the book and that Mika was called to bring it to the cafe. She was present and overheard Kofi making the call. However, since Yuna left the cafe before Mika arrived with the book and did not see Priya visiting the book store or arriving late, she doesn't know if Kofi's issue was resolved, nor is she aware that Priya was running late or that she had stopped by the bookstore.

Therefore, in sum, Kofi and Priya understand that Kofi forgot the book and relied on Mika for its delivery, with Yuna also sharing this knowledge. Kofi and Mika know about the restocking task before delivering the book, but this detail is unknown to the others. No one else but Priya knows about her late arrival and visit to the bookstore, and she remains uninformed about Mika's need to complete restocking first. Emeka has no knowledge of these events, and Yuna is left unsure as to whether the book issue was resolved after she had to leave the cafe abruptly.