A company estimates that the cost (in dollars) of producing a units of a certain commodity is given by C(x) = 200+0.05x+0.0001x (a)(5 marks) Find the average cost of producing a units. (b)(5 marks) Find the number of units which minimizes the average cost. (c)(5 marks) Use the Second-Derivative Test to verify that the average cost is minimal for this number of units.