1. Go to the Product Line worksheet, which lists three wind turbines that Four Winds Energy produces and sells. Madhu wants to find the product mix that generates the most net income for the company. Use Solver to maximize the percentage of difference between the even and optimal product mixes (cell F23) by changing the optimal product mix (range C10:E10) subject to the following constraints: The total units sold in the optimal product mix (cell D18) must be 4,750. The company needs to produce 1,200 or more of each turbine model, so the optimal mix values for each model (range C10:E10) must be at least 1,200. Those same values in the range C10:E10 must be integers. The Remaining values for each assembled part (range J5:J13) must be greater than or equal to zero because the company cannot produce more wind turbines than the parts available.