I need the answer for excersize 13

11. Show that each of these conditional statements is a tautology by using truth tables. a) (pq)p b) p(pq) c) p(pq) d) pq)(pq) e) (pq)p f) (pq)q 3. Show that each conditional statement in Exercise 11 is a tautology using the fact that a conditional statement is false exactly when the hypothesis is true and the conclusion is false. (Do not use truth tables.)