A manufacturer sells video games with the following cost and revenue functions (in dollars), where x is the number of games sold. Determine the interval(s) on which the profit function is increasing. C(x) = 0.19x2 - 0.00014x3 R(x) = 0.478x2 - 0.0002x3 Select the correct choice below and ll in any answer boxes within your choice. {3' A- The prot function is increasing on the interva|(s) (Type your answer in interval notation. Simplify your answer. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) {:22- B. The prot function is never increasing. For the cost and price functions below, nd a) the number, q, of units that produces maximum prot; b) the price, p, per unit that produces maximum prot; and c) the maximum profit, P. C(q)=70+18q; p=74-2q a) The number, q, of units that produces maximum prot is q = D. b) The price, p, per unit that produces maximum prot is p = $ c) The maximum prot is P = $ For the function f(x) = 7x - 5x2+ 3x + 8, find f'(x). Then find f''(0) and f''(9). f" (x) = Select the correct choice below and fill in any answer boxes in your choice. O A. f''(0) = (Simplify your answer.) O B. f''(0) is undefined. Select the correct choice below and fill in any answer boxes in your choice. O A. f'' (9) = (Simplify your answer.) O B. f''(9) is undefined