Jeremiah deposits in a bank an amount of $1000 that he had been holding at home in a jar for a long time.

a. If the banking system is 100 percent reserve, how does the money supply change?

b. If the reserve requirement is 10 percent and the bank hold no excess reserves, how does the money supply change?

c. If the reserve requirement is 10 percent and the bank hold an excess reserve of 2 percent, how does the money supply change?