:discrete math

fact: let s be a finite set with s=n.

then ps=2 n.

let s 1,2,3, 4,5, 6,7, 8,9}

a) how many subsets does s have in total?

b) how many proper subsets does s have?

c) how many subsets of s contain exactly 8 elements?

d) how many subsets of s contain the element 1?

e) how many subsets a of s satisfy the property that an1,2 ?

you