just need answer, steps are appreciated though

A local coach is opening a basketball camp for children. The coach wants to know the optimum number of trainers to have on staff. Children arrive at the first aid room a rate of 11 per hour, following a Poisson distribution. One trainer can handle 5 children/patients per hour following exponential service times. Trainers are paid $30 per hour and the cost of having a child wait for medical attention is $90 per hour. Here are the corresponding M and Lq values from table D.5. M3... Lq=1.4907, M4...Lq=0.2770, M5...Lq=0.0659. How many trainers should be staffed and what is the total cost? O 3 trainers, total cost $433.20 4 trainers, total cost $374.67 O 5 trainers, total cost $359.43 4 trainers, total cost $342.93 A local coach is opening a basketball camp for children. The coach wants to know the optimum number of trainers to have on staff. Children arrive at the first aid room a rate of 11 per hour, following a Poisson distribution. One trainer can handle 5 children/patients per hour following exponential service times. Trainers are paid $30 per hour and the cost of having a child wait for medical attention is $90 per hour. Here are the corresponding M and Lq values from table D.5. M3... Lq=1.4907, M4...Lq=0.2770, M5...Lq=0.0659. How many trainers should be staffed and what is the total cost? O 3 trainers, total cost $433.20 4 trainers, total cost $374.67 O 5 trainers, total cost $359.43 4 trainers, total cost $342.93