PLEASE SHOW WORK HOW TO SOLVED $($typed$)$ Thank you!$|$

Weekly sales of copy paper at Cubicle Suppliers are provided in the table below. Compute a three$-$period moving

average forecast, a four$-$period moving average forecast, and exponential smoothing forecasts with smoothing

constants of $0\mathrm{.}2$ and $0\mathrm{.}4$ for weeks $5,6,$ and $7.$ The forecast for week $4$ is $54$ cases. Compute the MAD value for

each forecasting methods. Which model is the most accurate? Forecast week $8$ with the most accurate method.

$(10$ Points$)$