he duration t (in minutes) of customer service calls received by a certain company is given by the following probability density function. (Round your answers to four ecimal places.) f(t) = 0.5e-0.5t, t0 (a) Find the probability that a call selected at random lasts 2 minutes or less. 0.6321 (b) Find the probability that a call selected at random lasts between 5 and 10 minutes. .0753 (c) Find the probability that a call selected at random lasts 2 minutes or less given that it lasts 5 minutes or less. 9179