How do I do this + answers

The time between arrivals of vehicles at a particular intersection follows an exponential probability distribution with a mean of 12 seconds. (a) Sketch this exponential probability distribution. x) x) 1'00 30 (b) What is the probability that the arrival time between vehicles is 12 seconds or less? (Round your answer to four decimal places.) (c) What is the probability that the arrival time between vehicles is 4 seconds or less? (Round your answer to four decimal places.) (d) What is the probability of 34 or more seconds between vehicle arrivals? (Round your answer to four decimal places.) Need Help