i need help with c

a. Using a simple three-month moving average, make a forecast for this month. (Round your answer to the nearest whole number.) b. If 290 units were actually kemanded this month, what would your forecast be for next month, again using a 3month moving average? (Round your answer to the nearest whole number.) c. Using simple exponential smoothing, what would your forecast be for this month if the exponentially smoothed forecast for three months ago was 450 units and the smoothing constant was 0.30 ? (Round your answer to the nearest whole number.)