plz help with all forward premiums and part C

Yen Forward. Use the following spot and forward Did-ask rates for the Japanese yervu.S. dollar (W) exchange rate from september 16, 2010, to answer the following questions: a. What is the mid-rate for each maturity? b. What is the annual forward premium for all maurities? c. Which maturities have the smallest and largest forward premiums? (Click on the icon to import the table into a spreadsheet) Period /Bid Rate W/S Ask Rate spot 85.41 1 month 85 02 85.05 2 months 84.86 84.90 3 months 84.37 84.42 6 months 83.17 83.20 12 months 8287 82.91 24 months 81.79 81.82 85.46 1 month 30 85.02 85.05 85.035 2 months 60 84.90 84.880 84.86 8437 3 months 90 84.42 14.395 83.185 6 months 180 83 17 12 months 360 82.87 83.20 82.91 81.82 82.890 81 805 24 months 720 81.79 b. What is the annual forward premium for all matunities? Calculate the annual forward premium for all maturities below (Round to three decimal places) Forward Premium Period Spot 1 month Days Forward 0 30 Bid Rate ws 85.41 85.02 Ask Rate ws 85.46 85.05 -5.731 %