In the following probability? distribution, the random variable x represents the number of activities a parent of a 6 th dash 6th- to 8 th 8th? -grade student is involved in. complete parts? (a) through? (f) below. x 0 1 2 3 4 ? p(x) 0.092 0.092 0.242 0.242 0.323 0.323 0.278 0.278 0.065 0.065 ? (a) verify that this is a discrete probability distribution. this is a discrete probability distribution because the sum of the probabilities is nothing and each probability is ? less than or equal to 1. greater than or equal to 0. between 0 and 1, inclusive. ?