3 questions if you can help me.

Question

1. Calculate the number of subsets and the number of proper subsets for the set.

{x|x is a day of the week}

2. Let U = {q, r, s, t, u, v, w, x, y, z}
A = {q, s, u, w, y}
B = {q, s, y, z}
C = {v, w, x, y, z}. List the elements in the set.

(A �¿ B) (A �¿ C)

Answer 1

See:
http://www.jiskha.com/display.cgi?id=1307635195