if you can show this in excel that would be great! thanks in advance!

A food truck selling mac and cheese wants to prepare forecasts of demand for their popular mac and cheese entree. They are considering a simple exponential smoothing forecast with alpha = 0.4. The following shows the demand and forecasts for the last 5 weeks. Week Actual Sales Exponential Smoothing Forecast alpha = 0.4 295 349 295 W N 339 317 356 326 325 338 a. What is the exponential smoothing forecast for Week 6? b. If the actual sales turns out to be 350, then what is the forecast error for Week 6