Use the following result to answer each of the following questions. Result. Let a, b e Z. If 5a + b is odd or a + 4b is even, then a or b is even. а. Carefully state the contrapositive of the result...

Extracted text: Use the following result to answer each of the following questions. Result. Let a, b e Z. If 5a + b is odd or a + 4b is even, then a or b is even. а. Carefully state the contrapositive of the result and simplify using DeMorgan's laws where appropriate. b. Prove the statement you gave in part a.