Only need parts (E & F)

Exercise 5.2.1: Here are two relations: Compute the following: a) TA+B.A (R); b) TB+1,C-1(S); c) TB,A(R); d)TB,C(S); e) (R); f) ?(S); g)YA, sUM(B) (R); h) 18.AVG(C) (S): l i) A (R); m) R