(b) (3 points) Medwick borrows $1000 at 2.5% annual interest compounded semi- monthly (twice per month) for 18 months. How much money must Medwick eventually pay back? Round your answer to 2 decimal places. (C) (3 points) Determine how long it will take in years for an investment to triple in value if it is compounded continuously at 2.75%. Round your answer to 2 decimal places (d) (2 points) Find the effective interest rate corresponding to 1.25% compounded every 2 weeks. (Give your answer as a percent to 2 decimal places.)