show work pls thanks

Given the following demand data 1. Part 1: Compute a weighted average forecast using a weight of .30 for the most recent period, .20 for the next most recent, .10 for the next, and .40 for the next. (5 points) 2. Part 2: If the actual demand for period 6 is 39 , forecast demand for period 7 using the same weights as in part 1 . (5 points) 3. Part 3: Why does moving average methods including simple exponential smoothing work better for this technique, why does linear trend or regression technique does not work here? Explain ( 2 points) 4. Part 4: Please use simple exponential forecasting to find forecast for period 6. Where the value of alpha is equal to 0.3 and forecast in period 2 is 41 . ( 8 points)