(b). Consider an economy described by the following equations (. Y =C +I+G Y = 5000; G = 1000; T = 1000; C = 250 + 0.75 (Y-T); I = 1000-50r i) In this economy: (1) Compute national savings (2) Find equilibrium interest rate.

Scenario 1: Individual Retirement Accounts (IRAs) allow workers to shelter a portion of their income from taxation. Suppose the maximum annual contribution to accounts of this type is $6,000 per person. Now suppose there is an increase in the maximum contribution, from $6,000 to $9,000 per year. Shift the appropriate curve on the graph to reflect this change. This change in the tax treatment of saving causes the equilibrium interest rate in the market for loanable funds tofall   and the level of investment spending toincrease   .   Scenario 2: An investment tax credit effectively lowers the tax bill of any firm that purchases new capital within some relevant time period. Suppose the government implements a new investment tax credit. Shift the appropriate curve on the graph to reflect this change. The implementation of the new tax credit causes the interest rate tofall   and the level of saving tofall   .   Scenario 3: Initially, the government's budget is balanced; then…

Consider an economy in which the consumption, investment and production functions are as follows.C = 90 + 0:7(Y - T)I = 250 - 20r F(K;L) = AK1=2L1=2The capital and labor supply are equal to 100 each, A=10, G = 200 and T = 200. Compute theequilibrium values of output, overall labor income, consumption, public savings, national savings,investment, and the interest rate.Suppose now government spending decreases to G=100 (everything else stays the same). Whathappens to output, consumption, savings, investment and the interest rate? Compute the newvalues for these variables.

The following graph shows the market for loanable funds. For each of the given scenarios, adjust the appropriate curve on the graph to help you complete the questions that follow. Treat each scenario separately by resetting the graph to its original state before examining the effect of each individual scenario.   (graph in image)   Scenario 1: Suppose savers either buy bonds or make deposits in savings accounts at banks. Initially, the interest income earned on bonds or deposits is taxed at a rate of 20%. Now suppose there is an increase in the tax rate on interest income, from 20% to 25%.   Shift the appropriate curve on the graph to reflect this change.   This change in the tax treatment of interest income from saving causes the equilibrium interest rate in the market for loanable funds to (a. fall, b. rise) and the level of investment spending to (a. increase, b. decrease).   Scenario 2: An investment tax credit effectively lowers the tax bill of any firm that purchases…