Use the scenario below to complete the remaining problems on this quiz.

A brokerage house offers three investment portfolio options. Portfolio I consists of 2 blocks of common stock and 1 municipal bond. Portfolio II consists of 4 blocks of common stock, 2 municipal bonds, and 3 blocks of preferred stock. Portfolio III consists of 7 blocks of common stock, 3 municipal bonds, and 3 blocks of preferred stock. A customer requests a total of 21 blocks of common stock, 10 municipal bonds, and 9 blocks of preferred stock. How many units of each investment portfolio should be offered to the customer ?

1.) What are your variables and what do they represent? Type them in the space below.

2.) What are the equations you will use to solve this system? Type them in the space below. Clearly label what each equation represents in terms of the problem.