Tracy and Diane, working as twohairstylists at coiffeur, dress hair of women at a rate of 3 women per hour. The hairdressing time for Tracy and Dianeis exponentially distributed. Women arrive to the coiffeur according to a Poisson distribution with a rate of 5 per hour. 1. a) What is the probability that Tracy is busy? 2. b) What is the probability that Diane is idle? c)On average, how many women are waiting for hairdressing