Consider the output quantity vector below. It relates to quantity produced per plant, per day:

Q

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Consider a cubic total cost function (estimated using historical production data):

TC(Q)=5+0.32*Q-0.25*Q²+0.38*Q³

Compute the average and marginal cost starting from Q=1 up to Q=15. The absolute value of the difference between average and marginal cost is minimized when _____ units are produced.