In a small office, there are three colleagues: Naledi, an accountant; Takashi, a project manager; and Esteban, a software developer. One day, the CEO of the company leaves a prototype of a new product in a locked cabinet in Takashi's office with the understanding that Takashi would present the prototype at the upcoming board meeting. Takashi has the only key to the cabinet. However, Takashi is called away on an emergency trip and he leaves the key with Naledi with instructions to hand over the prototype to Esteban when it's time for some software updates before the meeting. Naledi, wanting to keep the prototype secure, does not inform Esteban of the arrangements nor does she tell him about the key. She leaves the key in her desk drawer and leaves on a business trip the next day. While Naledi is gone, Esteban receives an email, supposedly from Takashi, instructing him to update the prototype's software immediately. Not knowing where the prototype is and assuming Naledi knows nothing of this last-minute request, Esteban tries to reach Takashi, but his efforts are in vain as Takashi has no reception on his trip. Esteban decides to wait for Naledi to return to ask her about the prototype. While awaiting her return, Esteban discovers from a forwarded email chain left open on a public computer that Naledi was given the key by Takashi. Esteban then searches Naledi's desk, finds the key, updates the prototype, and locks it back in the cabinet. 

Given this situation, who knows where the prototype is, who has access to it, and is aware of the software update? Provide a brief response.
In this scenario, Naledi knows the location of the prototype because she was trusted by Takashi with the key to the locked cabinet. She also knows that Esteban was supposed to update the software before the board meeting. However, she does not know that Esteban is aware of the prototype's location or that he has completed the software update since these events occurred while she was away on a business trip.

Takashi, who left on an emergency trip, knows the prototype's initial location and that Naledi has the key. However, he is not aware that Esteban has updated the software because he was not available, and there is no indication that he has learned about these developments during his absence.

Finally, Esteban knows the location of the prototype after discovering the email chain and finding the key in Naledi's desk. Esteban is aware that he has access to the prototype because he found the key and was able to update the software as requested. However, he is not aware if Takashi intended him to find the key this way, nor does he know if Naledi is aware of the supposed email from Takashi or the completed software update since he has not communicated with either Naledi or Takashi after updating the software.

Ultimately, each person has a unique knowledge of the situation: Naledi knows about the initial arrangement but not the subsequent developments, Takashi is unaware of recent events altogether, and Esteban is aware of the current situation with the prototype but does not know about Naledi's knowledge of the supposed last-minute instruction nor Takashi's intentions regarding the key and software update.