using PROMODEL. Customers arrive at the NoWaitBurger hamburger stand with an interarrival time that is exponentially distributed with a mean of one minute. Out of 10 customers, 5 buy a hamburger and a drink, 3 buy a hamburger, and 2 buy just a drink. One server handles the hamburger while another handles the drink. A person buying both items needs to wait in line for both servers. The time it takes to serve a customer is N(70,10) seconds for each item. Simulate for 100 hours. Collect statistics on the number of customers served per hour, size of the queues, and utilization of the servers. What changes would you suggest to make the system more efcient