At the end of the spring season, Comfy Shoes anticipates an increase in the demand to 50 customers per day. A change in the mix of packages demanded is also expected: 30% of the customers ask for Package 1, 10% for Package 2, 10% for Package 3 and 50% for Package 4. The company will hire an additional attendant to help with Service A (Walking Basics). The store operates 12 hours a day. 

20. What will be the bottleneck in the process given this new demand pattern?

a. Service A 

b. Service B 

c. Service C 

d. Service D 

e. Service E 

21. b. How many customers a day will not be served? 

a. 4 

b. 7 

c. 11 

d. 18 

e. 25