1. if we still use the product mix model with some revisions here. now, there are six available models, not just two. each computer must be assembled and then tested, but there are now three lines for testing. the inputs for the model are same here as before: (1) the hourly labor costs for assembling and testing, (2) the required labor hours for assembling and testing any computer model, (3) the cost of component parts for each model, (4) the selling prices for each model, (5) the maximum sales for each model, and (6) labor availabilities. these input values are listed in the file hw_09. xlsx. similarly, the company needs to determine the product mix that maximizes its total net profit.