The table shows the production function of Bob's Arcade.

Labor

(workers per day)

Option A

(10 pinballs)

Option B

(15 pinballs)

Option C

(20 pinballs)

1

10

17

20

2

15

23

26

3

18

27

30

4

20

30

33

Bob's pays $20 a day to rent a pinball and $70 a day to hire a worker.

a)Graph the ATC curves for all options.

b)What is Bob's minimum efficient scale?

c)Identify the LRAC curve on your graph.