In the following probability distribution, the random variable x represents the number of activities a parent of a K to 5th-grade student is involved in. Complete parts (a) through (f) below. X 0 1 2 3 4 D P(x) 0.446 0.063 0.276 0.137 0.078 (a) Verify that this is a discrete probability distribution. This is a discrete probability distribution because the sum of the probabilities is between 0 and 1, inclusive. less than or equal to 1. greater than 0 and less than 1. and each probability is