Texts: An economy has full-employment output of 6,000. Government purchases, G, are 1,600. Desired consumption and desired investment are C = 3,200 - 2,000r + 0.10Y, and I = 1,200 - 2,000r, where Y is output and r is the real interest rate.
a. Find an equation relating desired national saving, S, to r and Y.