(Solved): Prove the following statement by contrapositive. For any integers a and b, if 4(2a+5b), then 4 ...

Prove the following statement by contrapositive. For any integers $$a$$ and $$b$$, if $$4?(2a+5b)$$, then $$4?a$$ or $$4?b$$. What would be assumed to be true? $$a$$ and $$b$$ are integers and $$4?a$$ or $$4?b$$ $$a$$ and $$b$$ are integers and $$4?(2a+5b)$$ $$a$$ and $$b$$ are integers and $$4?(2a+5b)$$ $$a$$ and $$b$$ are integers and $$4?a$$ or $$4?b$$ $$a$$ and $$b$$ are integers and $$4?a$$ and $$4?b$$ What would be proven to be true? $$4?a$$ and $$4?b$$ $$4?a$$ or $$4?b$$ $$4?a$$ or $$4?b$$ $$4?(2a+5b)$$ $$4?(2a+5b)$$