In an assembly process involving six distinct operations, it is necessary to produce 250 units per eight-hour

Question:

In an assembly process involving six distinct operations, it is necessary to produce 250 units per eight-hour day. The measured operation times are as follows:
a. 7.56 minutes.
b. 4.25 minutes.
c. 12.11 minutes
d. 1.58 minutes.
e. 3.72 minutes.
f. 8.44 minutes.
How many operators would be required at 80 percent efficiency? How many operators will be utilized at each of the six operations?