Hello can I get some help with this question please

Let \(S = \{1, 2, 3, \dots, n\}.\) Three subsets \(A, B, C\) of \(S\) are chosen at random.

(a) Find the probability that \(A \cup B \cup C = S.\)

and there was another part that I am also having trouble with:

(b)Find the probablity that \(A \subseteq B \subseteq C.\)

Guest Oct 1, 2022