Consider a base case where a customer arrives every $38$ seconds and the Customer Service Manager can handle $140$ customers per hour. There are two Food Preparation Managers, each capable of handling $120$ orders per hour.

Currently, relatively few customers $($less than $(1)/(2)$ percent$)$ order the Onion Hamburger Deluxe. What would happen if the restaurant ran a sale on Onion Hamburger Deluxe, so that the customer arrival rate increased by $20\%,$ and $20\%$ of the orders were now for this item? Assume that the Customer Service Manager never helps the Food Preparation Manager and that these two processes remain independent. Use Exhibit$\_10\mathrm{.}9.$

Note: Do not round intermediate calculations. Round $"$Lq$"$ value and final answers to $4$ decimal places.