Question 16 5 pts A Mexican fast-food chain assembles items in assembly-line fashion. A customer first a) tells the first employee what type of food s/he wants (e.g., burrito, salad, or tacos), then b) tells the second employee what fillings s/he wants (e.g., chicken, fish, or vegetable), then c) tells the third employee what toppings s/he wants (e.g., lettuce, guacamole, or cheese), and finally d) pays a cashier for the order that may or may not include a drink. One employee works at each of the steps a) through c), and two cashiers take care of payments. On average, and per customer, step a) takes 2 minutes, step b) takes 3 minutes, step c) takes 1 minute, and step d) takes 4 minutes. What is the bottleneck of this system? Hint: DRAW A PICTURE! O Step a O Step Step b O Step d