4. (6 points) Let P be the statement If n is an odd integer, then n is odd integer." (a). What is the contraposition of P? (b). Prove P by contraposition. 5.(4 points) Let S(x,y) be the statement student x likes soft drink y, where the domain for x consists of all students at your school and the domain for y consists of all soft drinks. Use quantifiers to express "Not every student likes tea and soda