Answer:
PART-1
How should each instrument be changed if the Fed wishes to decrease the money supply?
The Fed would deportment open-market sales, increase the discount rate, and raise interest paid on reserves.
PART-2)
Will the change affect the monetary base and/or the money multiplier?
The money multiplier refers to the capacity of money that financial institute like banks produce with each dollar of funds. Money base is exaggerated by the open-market processes and discount rate. Any alteration in interest expenditures on reserves modifies the money multiplier.