IS LM curves Practice problem 7: Assume following (equations) summarize/represent structure of economy. C=Ca + 0.75(Y-T) Ca=800-25r T=400+0.2Y...

IS LM curvesPractice problem 7: Assume following (equations) summarize/represent structure of economy. If: C=Ca + 0.75(Y-T) Ca=800-25r T=400+0.2Y Ip=600-25r G=1200 (M/P)^d = 0.2Y-20r M^s/P=700 1. What are equations for IS and LM curves? What is equilibrium level of income and interest rate? What if mix of fiscal and monetary policies is changed. Te money supply is increased by 100 while government spending reduced by 250: 2. Does investment increase, decrease or remain unchanged? Why/calculate. 3. Does consumption increase, decrease or remain unchanged? Why/calculate.