help please

Problem 8-20 Installment loan for multiyears [LO8-2] Lewis and Clark Camping Supplies Inc. is borrowing $67000 from Western State Bank. The total interest is $21,600. The loan wil be paid by making equal monthly payments for the next three years. What is the effective rate of interest on this installment loan? (Input your answer os o percent rounded to 2 decimal places.) Effective rate of interest Problem 8-21 Cash discount under special circumstance [LO8-2] Mr. Hugh Warner is a very cautious businessman. His supplier offers trade credit terms of 2/11, net 90. Mr. Warner never takes the discount offered, but he pays his suppliers in 80 days rather than the 90 days allowed so that he is sure the payments are never late. What is Mr. Wamer's cost of not taking the cash discount? (Use 360-day year. Do not round intermediate calculations. Input your answer as a percent rounded to 2 decimal places.) Cont of not taking a cash discount % Problem 8-28 Hedging to offset risk [LO8-5) The treasurer for Pittsburgh Iron Works wishes to use financial futures to hedge her interest rate exposure She will sell five Treasury futures contracts at $195,000 per contract. It is July and the contracts must be closed out in December of this year Long-term interest rates are currently 14.30 percent. If they increase to 15,50 percent, assume the value of the contracts will go down by 15 percent. Also, If interest rates do increase by 12 percent, assume the firm will have additional interest expense on its business loans and other commitments of $158.000 This expense, of course, will be separate from the futures contracts a. What will be the profit or loss on the futures contract if interest rates increase to 15 50 percent by December when the contract is closed out? on futuros contract