Propositional logic, logical equivalent

Question

a) Determine whether the following statement forms are logically equivalent: p -> (q -> r) and (p -> q) -> r

b) Use the logical equivalence established in part (a) to rewrite the following sentence in two different ways. (Assume that n represents a fixed integer.) If n is prime, then n is odd or n is 2.

Can someone help me with the B one? its really confusing

Answer 1

If n is prime, then n is odd or n is 2.

The question is asking you to rewrite the sentence in two different ways in English

If n is prime and n is not odd, then n is 2.
If n is prime and n is not 2, then n is odd.

The following links do a better job of explaining it:

Logically_Equivalent_Statements

Exercises on Logic of Compound Statements and Valid Arguments