I would much appreciate help with the following problem:

Suppose Bank ABC, has $50,000 in reserves, $450,000 in loans lended to the public and $500,000 checking deposits. We assume that the Fed's required deposits is 10% and the public holds no cash.

Balance sheet (I think):

Assets Liabilities + Net worth

50,000 reserves 500,000 checking deposits

450,000 loans

If it sells $5000 in bonds, how would that affect the balance sheet, the Total deposits and Money supply? What would happen if someone forgot they had $5000 and deposit it in the bank?

Thank you very much!