If a bank that desires to hold no excess reserves and has just enough reserves to meet the required reserve ratio of 15 percent receives a deposit of $600, it has a a. $600 increase in excess reserves and no increase in required reserves. b. $600 increase in required reserves and no increase in excess reserves. c. $510 increase in excess reserves and a $90 increase in required reserves. d. $90 increase in excess reserves and a $510 increase in required reserves.