please help with 16

14. A savings and loan association pays 4% annual interest on deposits at the end of each At the end of every three years, a 2% bonus is paid on the balance (after interest) year. at that time. Find the effective annual rate of interest earned by an investor if he leaves his money on deposit (a) two years; (b) three years; (c) four years. 15. A credit card company charges its customers an interest rate of 1.583% on their monthly balance. The company claims that this is equivalent to an annualized rate of 18.996%. What's wrong with their claim? what does the rate of 18.996% represent? 16. An oil production platform in Alaska's Cook Inlet will operate for 15 more years. At. the end of that time, environmental regulations require dismantlement and removal. The current cost of this would be $10 million, but the cost is expected to increase by 5% per year (a) What is the present value of the future cost? Assume an annual discount rate of 11% (compounded annually). I 5/ (b) Suppose new regulations require the oil platform's owner to contribute an equal annual nominal amount to build up a trust fund sufficient to cover dismantlement and removal at the end of year 15. The trust fund has to be invested in U.S. Treasury bonds yielding 6.5% per year. How much will the oil company have to put in at the end of each year? (Optional): The present value of an annuity which pays $200 at the beginning of every 6-month period during the next 10 years and $100 at the beginning of every 6-month period during the following 10 years is $4,000. The present value of a 10-year deferred annuity which pays $250 at the beginning of every 6-month period for 10 years is $2,500. ind the present value of an annuity paying $200 at the beginning of every 6-month period uring the next 10 years and $300 at the beginning of every 6-month period during the