Forty percent of the customers who go to Sears Auto Center for tires buy four tires and 36% buy two tires. Moreover, 20% buy fewer than two tires, with 3% buying none. a. What is the probability that a customer buys three tires? (Round your answer to 2 decimal places. Probability b. Construct a cumulative probability distribution for the number of tires bought. (Round your answer to 2 decimal places.) 0) 2 3 4