If Takumi is standing at the base of a hill looking up, and Leila is sitting halfway up the hill, what can Takumi see, and what can Leila see?

Provide a very brief response.
Takumi can see Leila, since she is situated above him on the hill. The elevation difference may affect his view of her slightly, but he has a clear line of sight to where she is seated. Conversely, Leila can see Takumi and a broader expanse of the area behind him from her elevated vantage point. The higher position on the hill gives her a more comprehensive view of the surroundings below her than what Takumi can see from the base of the hill, which may be limited to just the hillside ascending before him.