Answer the following question in spanish:
how would you greet your coach in the afternoon?

Coch translates into the Spanish word entrenador, so we can answer this question as follows:

Buenas tardes entrenador, ¿cómo le va?

So he can give a reply as follows:

Estoy muy bien ¿y tú?

So this is a common way to greet your coach and a common response from him.