2. Consider the National Income model given by the following equations. Y-C- I-G, = 0 C-a-B(Y-T) = 0 T-Y-SY=0 where Y, C, and T are endogenous variables and I., Go, a, B, y, 8 are exogenous and 3 and 8 are positive fractions. Use Cramer's Rule to find the effect of a change in G, on Y and C.