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Some Valid Conditionals Whose Converses Are Invalid (a) Vx A(x) 14(x). (b) *x (4(x) AB(x)) x 4(x) ^ x B(x). ) Vx A(x) V x B(x) + x (4(x) VB(x)). (d) Vx (4(x) > B(x)) (Vx A(x) Vx B(x)). (e) ir Vy P(x, y) Vy 1x P(x, y). Quiz (5 minutes). Find a countermodel for each converse of the above wifs