Determine Whether the Given Argument Is Valid or Invalid

Multiple Choice

determine whether the given argument is valid or invalid. If it is invalid, select a counterexample.
-1. (∃x) (Jx • ∼Kx) ⊃ (∃x) (Lx • Mx)
2) (∃x) (Jx • Lx)
3) ∼(∃x) (Jx • Kx) / ∼(∀x) (Lx ⊃ Mx)

A) Valid
B) Invalid. Counterexample in a domain of 1 member, in which:
Ja: True Ka: False La: True Ma: True
C) Invalid. Counterexample in a domain of 1 member, in which:
Ja: False Ka: False La: True Ma: True
D) Invalid. Counterexample in a domain of 1 member, in which:
Ja: True Ka: True La: True Ma: True
E) Invalid. Counterexample in a domain of 1 member, in which:
Ja: True Ka: False La: False Ma: False