In a survey on student success, 20 students were asked questions related to their enrollment. The answers to the question, "How many classes are you enrolled in this semester?" are shown in the table. 5 1 3 4 6 4 5 6 6 4 7 5 1 4 5 5 4 5 5 6 (a) Complete the probability distribution using the results from the table. Round answers to four decimal places. X P ( X ) 1 2 3 4 5 6 7 + (b) Find the probability that a student is taking 3 or fewer classes. Round the answer to four decimal places