Q1. Michael is solving a macroeconomic model and has managed to reduce it to the following system of simultaneous equations:

+ 2 = 2 {5 + 4 + 3 = 5

4 + + 2 = 2

A. Write down this system in matrix form. (2 points)

B. Explain Cramer's rule for solving systems of linear equations. (4 points)

C. Apply Cramer's rule to obtain any one of , or that satisfy the system of equations above. (4 points)