Question 1 1. 3x P(x) A 3x Qx) 2. 3x PIX) 3.PC) 4. 3x Q(x) 5.Q(c) 6.P(c)(c) 7...3x (P(x) AQ(x)) premise conjunctive simplification, 1 existential specification, 2 conjunctive simplification, 1 existential specification, 4 conjunction, 3,5 existential generalization, 6 Choose all choices which apply to the 'proof given above. The proof is valid. There is an error at exactly one step. There are errors at exactly two steps. There are errors at exactly three steps. Derivation at Step 2 is wrong. Derivation at Step 3 is wrong, Derivation at Step 4 is wrong. Derivation at Step 5 is wrong. Derivation at Step 6 is wrong. Derivation at Step 7 is wrong