4. (12 points) The Central Perk processes an average of 460 orders each day. The average cost of each order is $5.40. Four percent of the orders are prepared incorrectly, and 8% of the orders are delivered to the incorrect customer. Only 12% of the defective orders can be corrected with additional food items at an average cost of $1.05. The remaining defective orders have to be thrown out. Hint: Preparation and delivery are two sequential stages of the process. a. What is the daily yield, i.e., the daily number of good orders? b. Compute the average product cost. C. Compute the quality-productivity ratio (QPR) for Central Perk