Use Indirect Truth Tables to Determine Whether Each of the Following

Short Answer

use indirect truth tables to determine whether each of the following arguments is valid. If the argument is invalid, specify a counterexample.
-(W $\lor$ X) ⊃∼(Y • ∼Z)
∼(Y • W) ⊃∼Z
∼(W $\lor$ X) $\lor$ Z / (Z $\lor$ W) ⊃ (X • Y)