9. A bicycle shop sells road bikes and town cruisers. It takes 2 hours to assemble a road bike. It takes 1 hour to assemble a town cruiser. A maximum of 60 hours a week is set aside to complete the assembly for both types of bike. After assembly, for safety reasons the assembly needs to be checked and tested. It takes - hour 2 to check and test the road bikes, and - hour to check and test the town cruisers. A maximum of 20 hours per week is set aside to complete these tasks for both types of bike. a. What is a system of inequalities that models this scenario? A b. What is the graph of the solution to this system?