Consider the sinking fund in the previous question.

a$.$ What is the total amount deposited by the

company in this annuity?

c$.$ If the total amount deposited had been

invested as a one$-$time deposit with the same

interest rate, how much would the account

be worth after $10$ years?

b$.$ How much interest did the annuity earn over

the $10$ years?

d$.$ What one$-$time deposit would be required in

an account with the same interest rate to

cover the planned maintenance costs?