4. Using a graph representing the market for loanable funds, show and explain what happens to interest rates, savings and investment if the following happen: i. Government goes from a deficit to a surplus. 11. Government repeals/stops an investment tax credit. 11i. Government introduces a tax on interest income. The demand for loanable funds is given by QD = 160- 10r and the supply for loanable funds is given by QS = -20 + 20r. Graph these equations and calculate the equilibrium savings, investment and interest rate