Please help me solve the following question for a and b

this is a business analytics course (mos 2298)

Thanks

Sixty percent of the customers who go to ABC Tires for tires buy four tires and 22% buy two tires. Moreover, 14% buy fewer than two tires, with 4% 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 answers to 2 decimal places.) x P(Xsx) 0 1 2 3 4