a) Write the negation for the following statement and then use a counterexample to disprove the given statement. i. For every integer k, if k is odd then ii. 2 is odd. For every integer k, if k is prime then k - 1 is even. For every integers p and q, if 51(p+q) then 51(p - q). (4 Marks) (4 Marks) (4 Marks)