Answer:
Interest rate falls
Aggregate demand rises
Increase the supply of money
Buy treasury bills and government bonds
Step-by-step explanation:
1. According to the theory of liquidity preference, when people want to keep more cash it triggers a fall in interest rates because they are no longer willing to keep money in the banks and hence the relationship between demand for money and interest rate is inverse.
2. Aggregate demand rises because people will want to withdraw more cash and keep them because they are not sure when the computer virus issues will be resolved on the ATM's
3. If instead the Fed wants to stabilize aggregate demand, it can increase the supply of money as well in order to create a balance between the forces of demand and supply.
4. Finally, if the Fed wants to accomplish the above change in the money supply using open-market operations, it can do so by BUYING government bonds and treasury bills. This action will release cash into the hands of bill bond holders, increasing the supply of money in circulation.