Doc Cottle is considering opening a new office in five years and estimates the startup costs will be $55,000. Market interest rates are 4%. a. How much must Doc Cottle deposit now to have the desired amount in five years? b. If the market interest rate starts at 4% for the first two years and then changes to 2% for the last three years, how much must be invested today to have the startup funds in five years? c. If Doc Cottle decides to invest an additional $2,000 at the end of each year for the five years, how much must he invest today to have the $55,000 in five years