Final answer:
If inflation rises unexpectedly by 5%, some economic actors are helped while others are hurt. A union member with a COLA wage contract is helped, but someone with a large stash of cash, a bank lending at a fixed interest rate, and a person with no upcoming pay raise are hurt.
Step-by-step explanation:
If inflation rises unexpectedly by 5%, the economic actor is affected differently in each scenario:
A union member with a COLA (Cost of Living Adjustment) wage contract is helped because their wages increase with inflation.
Someone with a large stash of cash in a safe deposit box is hurt because the cash loses value due to inflation.
A bank lending money at a fixed rate of interest is hurt because the interest rate does not increase with inflation, causing their returns to be eroded by inflation.
A person who is not due to receive a pay raise for another 11 months is hurt because their purchasing power decreases when inflation rises.