Boot Barn sells cowboy boot and western wear through catalogs and the web. Customers can phone in orders at any time day or night, 7 days a week. During the 1 am to 9 am shift, a single sales rep handles all calls. During this time, calls arrive at a rate of 14 per hour following a Poisson distribution. It takes the sales rep an average of four minutes to process each call. The variability in service times is approximately exponentially distributed. All calls received while the sales rep is busy are placed in a queue.

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Which of the following statement regarding this problem is not true?

Group of answer choices

A.

M/M/s model is suitable to analyze this problem.

B.

= 14

C.

= 4

D.

M/M/1 model can be used to analyze the problem.

PART B

On average, how long must customers wait in line before talking to the sales rep? Rounding decimals of your calculation to units.

Group of answer choices

56 minutes

60 minutes

33 minutes

72 minutes

a duration (in minutes) different from all the above

PART C

On average, how many people are on hold? Keeping four decimals of your calculation.

Group of answer choices

13.0667

14.0000

0.9333

14.9333

a number different from all the above