Question 6 (Mandatory) (4 points) A car repair shop has two adjacent garages where cars can be taken for repair work. Currently one garage is dedicated for routine repair and one for major repairs. Customers arrive daily at a rate of 5 per hour. A study indicates that 4 of the 5 are usually routine repairs and 1 requires major work. Routine repairs take on average 1 hour to complete and major ones take on average 2 hours. On average there are 6 cars waiting for routine repairs and 2 waiting for major repairs. Cars are served on a first come first serve basis. How many cars are on average in the shop (both garages)? a) 8 cars b) 13 cars c) 11 cars d) 14 cars