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6. Christopher needed some equipment for his landscaping business. He borrowed $1000 from a bank. Simple interest is charged on the loan at 9%. Christopher plans to pay off the loan in a lump sum at the end of two years. Determine the interest owed at the end of the year. 7. Troy had an outstanding balance of $1236.90 on his credit card for 80 days. The annual interest rate is 18.2%. How much interest did Troy pay? 8. Julia invested $875 at 2.8% compounded quarterly for 10 years. What is the amount of the investment at maturity? 9. Pat borrowed some money from a bank and will repay the loan in 3 years. The interest rate is 12.5% compounded monthly. Pat must repay $1426.73 in 3 years. How much did Pat borrow? 10. Justin is taking out a personal loan of $12 000. He will be charged 14.35% interest compounded monthly. The loan is to be repaid monthly for the next years. Determine Justin's monthly payment