(3) [10pts] Suppose that P(n) is a propositional function. For the following properties of P(n), determine for which set of positive integers n, P(n) must be True: 1. [5pts] P) is True; and for all positive integers n, if P(n) is True then P(n+1) is True 2. [5pts] P( is True; and for all positive integers n, if P(n) is True then P(3n) is True