Please answer the following

Balance sheet of the Summer Bank Assets Liabilities Cash $ 8,000 Deposits $ 100,000 Deposited with the Fed $ 4,000 Capital $ 70,000 Loans $ 158,000 Total $ 170,000 Total $ 170,000 The required reserve ratio on all deposits is 6% a. What, if any, are this bank's excess reserves? b. How much new amount of loan will this bank be able to create because of the excess reserves? c. How much new amount of loan will the entire banking system be able to create because of this excess reserves? d. Answer part a, b and c if the required reserve ratio is changed to 5%