an economy full employment output of 6000, govt purchases of G, are 1200.desired consumption and investment are cd=3600-2000 r+0.10 y, desired investment id=1200-4000r where y is output and r is real interest

(a) find desired nation saving, sd, to r and y.

(b)government purchases rise to 1440. how does this increase change the equation describing desired nation saving?show the change graphically what to the market real interest rate