please show work.

Problem 7-28 (Static) A toll tunnel has decided to experiment with the use of a debit card for the collection of tolls. Initially, only one lane will be used Cars are estimated to arrive at this experimental lane at the rate of 750 per hour. It will take exactly four seconds to verify the debit card o. How much time would you expect a customer to wait in line pay with a debit card, and leave? (Do not round Intermediate calculations.) Average total time seconds b. How many cars would you expect to see in the system? (Round your answer to 2 decimal places.) cars Average number in system