4. Suppose that when x units are produced, the total cost is C(x) = 3x² + 12x+14 and the selling price per unit is p(x) = 44 - x. Find the level of pro- duction that maximizes total profit. Hint: Total profit is P(x) = R(x) — C(x). - (a) 5 units (b) 8 units (c) 4 units (d) 6 units (e) maximum does not exist 4A 4C 4B 4D 4E

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