4.[Bonus Problem] Identify the error or errors in this argument that supposedly shows that if 3xP(x) xQ(x) is true then 3x(P(x) Q(x)) is true. 1. 3xP(x) v 3xQ(x) Premise 2. 3xP(x) Simplification from (1) 3. P(c) Existential instantiation from (2) 4. 3xQ(x) Simplification from (1) 5. Q(c) Existential instantiation from (4) 6. P(C) Q(c) Conjunction from (3) and (5) 7.3x(P(x) ^ Q(x)) Existential generalization