6.0) 8. Find the simple interest on a $15,000 investment made for 3 years at an interest rate of 4% per year. What is the accumulated amount? (5) todo 9. Find the total amount due on a loan of $800 at 18% simple interest at the end of 4 months. (4) 10. A bank deposit paying simple interest grew from an initial sum of $2000 to a sum of $2075 in 9 months. Find the interest rate. (Express your answer as a percentage, correct to two decimal places