Please help me with these!

You are buying a new car. You will borrow $8,000 from the bank in order to pay ;or the car. The interest rate is 12%. The loan requires monthly payments for two years. What will be the monthly payments on the loan? Five years ago, a stock was earning 5% return. This year, it has earned 16%. What is the growth rate? If you invest $100 a year for 25 years, making the payments at the end of the year, and the expected rate of return is 10% annually, how much will you have? Now assume that you made the above payments at the beginning of the year instead of at the end of the year. How much will you have? Spartan Financial Corporation offers to lend you $75,000; the loan calls for annual payments of $9.860.51 for 15 years. What rate of interest is the company charging you