Hideki's coordinator is Hiroshi, which means Hiroshi helps manage Hideki's scheduling and class resources. Emiko's coordinator is Yumi, who would assist Emiko in her scheduling and resource needs. Akira's coordinator is also Hiroshi, establishing that Hiroshi assists both Hideki and Akira with their respective class preparations.

Emiko and Akira run a joint session on cultural exchange every Tuesday, which indicates they share responsibilities and collaborate on that particular class. Since Hideki hosts a different class on traditional arts every Wednesday and is not mentioned as part of the Tuesday class, it can be inferred that Hideki has no involvement in the joint Tuesday cultural exchange class.

Hiroshi is involved in coordinating classes for both Hideki and Akira. He coordinates Hideki's traditional arts class every Wednesday and also works with Akira on the joint Tuesday session on cultural exchange. As Akira and Emiko jointly conduct the Tuesday class, Hiroshi must coordinate with Akira for this session, despite Emiko's coordinator being Yumi.
In a community center, there are three instructors: Hideki, Akira, and Emiko. Each instructor has a coordinator assigned to help with their schedules and resources: Hideki's coordinator is Hiroshi and Emiko's coordinator is Yumi. Akira's coordinator is also Hiroshi. Emiko and Akira decided to combine their Tuesday classes to offer a joint session on cultural exchange, while Hideki hosts a separate class on traditional arts every Wednesday. Explain the relationships between the instructors and their respective coordinators. Also explain the involvement Hideki has in the joint Tuesday class on cultural exchange. Finally, explain what sessions or classes Hiroshi is involved in coordinating.

Respond briefly.