Are the following formulas: Valid? Not valid but Satisfiable? Or Invalid?

Question 1 The formula Vz (A B) ^ Vz A ^ z B is [ Select] The formula 3zA3xB (A ^ B) is [Select] The formula (VTA- Vz B) VzA is [ Select ] The formula Yz(A+ B) (vzA-wzB) is l Select]