Question: State for each formula whether it is unsatisfiable, satisfiable but invalid, or valid. No justification is required. ( a ) AAx. P ( x )

State for each formula whether it is unsatisfiable, satisfiable but invalid, or valid.
No justification is required.
(a) AAx.P(x)EEx.P(x)
(b) not((AAx*P(x))harr(AAx*P(x)))
(c) EEx*Q(x)P(x)??Q(x)
(d) AAx.P(x)??Q(x)Q(x)
State for each formula whether it is unsatisfiable, satisfiable but invalid,

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