help me aswrring this question, show all work, explain, ysing excle. please don't copy work from other posting question. and show all work including how you got ghe answer

Burrito King (a new fast-food franchise opening up nationwide) has successfully automated burrito production for its drive-up fast-food establishments. The Burro-Master 9000 requires a constant 45 seconds to produce a batch of burritos. It has been estimated that customers will arrive at the drive-up window according to a Poisson distribution at an average of one every 50 seconds. To help determine the amount of space needed for the line at the drive-up window, Burrito King would like to know a. the expected average time in the system b. the average line length (in cars), and o the average number of cars in the system (both in line and at the window)