The call center of a telecom services provider is overloaded all day. On average, there are always 20 callers on hold or being served. The totallength of the call process from dialing to hanging up takes 40 minutes although the average conversation time is only 10 minutes per caller andemployee.

How many employees are involved in the process?

a. 2 employees b. 8 employees c. 3 employees d. 7 employees e. 5 employees