Determine whether each of these compound propositions is satisfiable

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Determine whether each of these compound propositions is satisfiable.

a) (p ∨ ¬q) ∧ (¬p ∨ q) ∧ (¬p ∨ ¬q)
b) (p → q) ∧ (p → ¬q) ∧ (¬p → q) ∧ (¬p → ¬q)
c) (p :left_right_arrow: q) ∧ (¬p :left_right_arrow: q)