At a car wash, services offered include vacuum, wash and detail. The vacuum process has a demand of 18 customers per hour. The wash process has demand of 13 customers per hour. The detail process has a demand of 12 customers per hour. There are 2 employees staffing the vacuum process and each has a capacity of 10 customers per hour. The wash process is staffed by 3 employees, who can each serve 5 customers per hour. The detail is performed by 4 employees. each of whom can serve 7 customers per hour. Instruction: Round your answer to the nearest integer percentage. What is the implied utliration of the bottieneck msource