(10 points) (a) A $470 loan is taken out with a 7% simple annual interest rate for 6 years. Interest owed at the end of the loan: $ Total amount to repay after 6 years: $ (b) Theo invested $8200 in a savings bond. When it matured after 13 years, Theo cashed out the bond and received a total of $14329.5. The simple annual interest rate for Theo's bond: % (round to 2 decimal places) (c) Roxy borrowed money from her aunt 8 years ago. They agreed to a simple annual interest rate of 4% on the loan. Roxy is ready to pay back the loan and she has determined that she owes a total of $1194.6 to her aunt. The amount Roxy originally borrowed (round to the nearest dollar): $ The total amount of interest that Roxy's aunt earns on the loan: $ (d) A $1480 deposit was made in an account that pays 3.7% simple annual interest. If the account was closed today, the total amount in the account would be $3256. How long ago was the deposit made into the account (round to 2 decimal places)? years