Suppose the number of years that a computer lasts has density 8x−3 if x ≥ 2 a) find the probability that the computer lasts between 3 and 5 years. b) find the probability that the computer lasts at least 4 years. c) find the probability that the computer lasts less than 1 year. d) find the probability that the computer lasts exactly 2.48 years. e) find the expected value of the number of years that the computer lasts.