the answer key is provided please show the formulas to solve the problems IN EXCEL thanks!!!

the answer jey is provided please show me the formulas IN EXCEL to find the answers please!!! 3. Smoothed forecast for Period 6. (Use a = 3) 4. Mean Squared Error for Periods 1-5. 5. Mean Absolute Deviation for Periods 1-5, 5. Average percent orror for Periods 1-5 7. Using linear regression in Excel, make a forecast for period 8 using trend projection Period Actual Domand Forecast Domand Error You mu chce Squared Error mus Absolute Deviation You Ball Percent Error You mu calcuna 1 2 3 4 5 48 45 142 45 40 52.60 48.97 46.82 46.78 4539 The data in Excel format are available on Canvas Answer key 2 434 437 1:48 5 34 37