A small town with one hospital has 3 ambulances to supply ambulance service. Requests for ambulances during nonholiday weekends average 0.58 per hour and tend to be Poisson-distributed. Travel and assistance time averages 1.90 hours per call and follows an exponential distribution Use Table 18.4 o. Find system utifization. (Round your answer to the neorest whole percent.) b. Find the average number of customers waiting. (Round your onswer to 3 decimal places.) Find the average time customers wait for an ambulance. (Round your onswer to 3 decimal places.)