Sven and barry’s very berry yogurt shoppe has two servers and a single line. the service time is exponentially distributed with a population mean of one minute. both servers, sven and barry, are busy right now and there are three people waiting in line. when caitlin arrives to the shop, she joins the end of the line. assume that service begins immediately upon the departure of a customer. (a) what is the probability density function of caitlin’s waiting time in line? (b) what is the probability that caitlin will wait in line for more than three minutes?