Question: how many rows appear in a truth table for each...

How many rows appear in a truth table for each of these compound propositions?

a) (q → ¬p) ∨ (¬p → ¬q)

b) (p ∨ ¬t) ∧ (p ∨ ¬s)

c) (p → r) ∨ (¬s → ¬t) ∨ (¬u → v)

d) (p ∧ r ∧ s) ∨ (q ∧ t) ∨ (r ∧ ¬t)