Philosophy problem

Section I. Test the following sentences to see whether they are (a) tautologies, (b) contingent formulas, or (c) contradictions. (See CH 3, p. 66.)

1. (⁓P → (P → Q)) 2. (P → (R → ⁓Q)) 3. (⁓P → Q) v (⁓P & ⁓Q)

Your answer should do two things: tell me whether the sentence is (a), (b) or (c) and list the truth values under the main connective of the sentence. If you look at the truth table for (Q → P), you'll see that the truth values under the main connective -- the one least embedded in parentheses -- are: T T F T. You'll see by that this it is a contingent statement.