Answer:
O4.1% interest
Step-by-step explanation:
Inflation erodes the strength of a currency. If the interest rate on offer is below the inflation rate, saving money in a bank will result in a loss.
To gains from a savings account, the real rate of interest must be positive. The real rate will the nominal interest rate( the quoted rate) - the inflation rate. The higher the nominal rate, the better for the customer.
In this case, 4.1 % will be best for the customer. If the inflation rate is 3.5%, an interest rate of 4.1% will give a real interest rate of 0.6%.