Homework: Week 12 HW 12 (L28, L29) Question 13, Bus Econ 6... HW Score: 30.44%, 5.78 of 19 points Save Part 1 of 3 Points: 0 of 1 Determine the average cost function C(x) = -. To find where the average cost is smallest, first calculate C'(x), the derivative of the average cost function. Then use a graphing calculator to find where the derivative is 0. Check your work by finding the minimum from the graph of the function C(x). C(x)=-x3+4x2-2x+30 Determine the average cost function. C(x) =