Note: it supposed to be four multiple-choice questions but instead I asked two of them so that you can explain them more efficiently. Please answer both.

Q: Repair and maintenance activities in a factory will be carried out by teams of one or two repairman. If the repair and maintenance activities are carried out by two repairmen it is completed in a short time. The distribution of the time spent by alternative teams for repair and maintenance activities given below tables. Each repairman cost is 20$/hour in daily working hour and 30$/hour in overtime working hour. The cost of machine being idle is 5,000$/hour. Evaluate 5-days simulation. (Daily working hours is 8 and average of daily breakdown is 5) (Random Numbers: 42, 21, 39, 23, 78)

For One Repairman		For Two Repairman
Service (minutes)	Probability (%)	Service (minutes)	Probability (%)
40	15	35	20
90	20	75	30
120	40	90	35
180	25	120	15

1. What is the total cost of working with single repairman?

1. 50,220
2. 160
3. 50,160
4. 60
5. 390

2. What is the idle time of the machines in case of working with a single repairman?

1. 600
2. 200
3. 430
4. 530
5. 453