A new bank has vault cash of $1.0 million and $4 million in deposits held at its Federal Reserve District Bank. (a) If the required reserves ratio is 8 percent, approximately what dollar amount of deposits can the bank hold? (Answer in millions) Bank deposits $ | million (b) If the bank holds $72 million in deposits and currently holds bank reserves such that excess reserves are zero, what required reserves ratio is implied? (Round answer to 1 decimal place, e.g. 5.1.) Required reserves ratio