NEED HELP ASAP!

1.

You are given the following information about a closed economy: YD = Y(1 - 0.25) + 125 C = 100 + 0. 8YD I = 320 - 50i G = 460 L = 0. 25Y - 62. 5i M P = 500 A. What are the equations of the IS and LM curves, and what are the general equilibrium levels of income and the interest rate? (Hint: Solve for equilibrium income in the goods market as a function of the interest rate, solve for equilibrium income in the money market as a function of the interest rate, and then equate equilibrium income in both markets to find the general equilibrium interest rate.) (12 points) B. Draw a diagram to show how an increase in government purchases would affect the interest rate and income level in the general equilibrium? Why does the income level in the new equilibrium not equal the increase in government purchases multiplied by the multiplier? (8 points)