Construct a formal proof of validity for each of the following arguments, using the suggested notation in each case. If he attracts the farm vote, then he will carry the rural areas, and if he...

Construct a formal proof of validity for each of the following arguments, using the suggested notation in each case.

If he attracts the farm vote, then he will carry the rural areas, and if he attracts the labor vote, then he will carry the urban centers. If he carries both the urban centers and the rural areas, then he is certain to be elected. He is not certain to be elected. Therefore, either he does not attract the farm vote or he does not attract the labor vote. ( F, R, L, U, C)