TALLER EN INGLES EJERCICIO 8

8- classic car care has one worker who washes cars in a four step method-soap, rinse, dry, vacuum. the time to complete each step is exponentially distributed whith a mean of 9 minutes. every car goes throgh every step before another car begins the process. on the average one car every 45 minutes arrives for wash job, according to a poisson process. what is the average time a car waits to begin the wash job? what is average number of cars in the car wash system? what is the average time requiered to wash a car?

(M/M/1):(DG/∞/∞)