I don't understand how to do this

Use the truth-table method to determine whether the following argument form is valid or invalid. Do the computations and determine if the form is valid or invalid. Use the short truth-table method (quick computational method) to determine whether the following argument form is valid or invalid. I am showing you how two cases need to be distinguished. Continue by filling in all the remaining spots. Then determine if the argument form is valid or invalid. Use the truth-table method to determine whether the following formula is a tautology, a contradiction, or a contingency