The event planner of the County Street Fair is deciding how many backup electric generators to have available onsite. The generator can be rented for a fixed rate of $1600 per unit for the entire fair whether or not it is used (non-refundable), and if it is used there is an extra $500 operating expense per unit. Due to the long setup time and logistical constraints, the decision has to be made prior to the event and no extra unit can be delivered during the fair.The probability of requiring certain number of backup generator during the fair can be described as follows:Units Required Probability0 0.151 0.452 0.203 0.20When a generator is required but not available, the lost revenue is estimated to be $5000.a. Determine the optimal service level (Round your answer to 2 decimal places.)b. How many backup generators should the planner rent?The event planner of the County Street Fair is deciding how many backup electric generators to have available on site. The generator can be rented for a fixed rate of $1600 per unit for the entire fair whether or not it isused (non-refundable), and if it is used there is an extra $500 operating expense per unit. Due to the long setup time and logistical constraints. the decision has to be made prior to the event and no extra unit can bedelivered during the fair.The probability of requiring certain number of backup generator during the fair can be described as follows:Units Required Probability0 0.151 0.452 0.203 0.20When a generator is required but not available, the lost revenue is estimated to be $5000.a. Determine the optimal service levelOptimal service levelRound our answer to 2 decimal places.)0.69b. How many backup generators should the planner rent?Number of generators J I