What requirements are necessary for a normal probability distribution to be a standard normal probability distribution? Choose the correct answer below. The men and standard deviation have the values of mu = 0 and sigma = 1 The men and standard deviation have the values of mu = 1 and sigma = 1 The men and standard deviation have the values of mu = 1 and sigma = 0 The men and standard deviation have the values of mu = 0 and sigma = 0