Part 4 - Optimization Problems (2 points each) Solve each maximization problem below. Remember, to solve optimization problems first take the derivative of the objective function (the equation after the "max" ) with respect to the choice variable (the variable under the "max"), then set the derivative equal to zero and solve that equation for the choice variable. 20. max {-17x2 + 68x - 12} 21. max {In(x) + 9 In(6-2) 22. max 3.2 - 3x Page 2