In determining which van best suits our needs, it is important to consider all costs, which include acquisition, operation, and maintenance. The total cost for these vans is estimated to be 48 cents per mile for a 12-seat van, 73 cents per mile for an 18-seat van, and 92 cents per mile for a 30-seat van. Our policy is not to mix van types at any airport, as it can confuse the customer, and it greatly increases the maintenance costs. However, our surveys did reveal that customers tend to prefer the larger vans.For now, you can assume that the number of vans and rental agents will be constant for the 4.5-hour time period. Although our surveys suggest that all customers would like to have service in less than 20 minutes for arrivals and less than 18 minutes for departures, we are aware that this might be difficult to achieve. In addition, there is that occasional customer who just takes longer to serve. Thus, we are willing to accept an 85% customer satisfaction rate for our base analysis. However, it would be helpful if you could also provide the requirements for a 90% customer satisfaction rate.Of course, if we are successful in developing an economical configuration for this airport, we estimate that this increased service level, accompanied by advertised incentives, could increase our patronage by as much as 20%. What changes would be required to meet this additional demand? Please include a cost estimate of configurations considered with your proposal based on an operating cost per day.