'. This year X, Y, and 2 formed a new corporation. X and Y contributed appreciated property for 50 percent of the stock. Z contributed property and services for the remaining 50 percent of the stock. 0f the amounts given below, What is the minimum amount of stock that Z must receive for his property contribution if the exchanges of X and Y are to be nontaxable. a. 8 percent b. 10 percent 0. 20 percent (1. 30 percent e. 50 percent