Please only help me with section e of this question.

3. In the country of SpringNow, the public is holding a total of $2,500. Total lending in the banking sector, which has 5 identical banks, is $38,000. The currency deposit ratio is 5% and the reserve requirement is 15%. The banks may hold excess reserves. the balance sheet for one of the 5 banks. w much reserves do the banks hold as a fraction of total deposits? How large is the money supply in this economy? hat is the money multiplier in this economy? (e) How would a $3,000 open market sale of bonds by SpringNow central bank change total reserves and money supply in SpringNow? Assume that all the banks behave identically