3. The central bank holds $1,800 in government securities. The commercial banks have deposited $500 with the central bank and hold $100 in vault cash. $900 are held as currency by the public. The required reserve ratio is 20%. Banks are loaned up. (a) Fill the central bank's T-account below. Assets Gov't securities Liabilities Reserve Currency in circulation The sums of the two sides of a T-account must be equal. But this is not a complete T-account. The two sides may not be equal. (b) What is the money supply? (c) The central bank would like to change the money supply to $3,300 either by an open market operation or a change in the required reserve ratio. (i) What should be the new ratio if the required reserve ratio is changed? (ii) How much government securities should be purchased/sold if an open market operation is undertaken? (d) What will be the change in interest rate and security price after the change in (c)?