$4\mathrm{.}5$ Ambulance Mileage Prediction $(40\%$ of total grade$)$ Using the mileage data for Carbondale Hospital's ambulance: a$)$ Forecast the mileage for next year using a $2-$year moving average. b$)$ Calculate the Mean Absolute Deviation $($MAD$)$ for the $2-$year moving average forecast. c$)$ Apply a weighted $2-$year moving average with weights of $0\mathrm{.}4$ and $0\mathrm{.}6$ to forecast next year's mileage. d$)$ Compute the forecast using exponential smoothing with $\backslash$alpha $=0\mathrm{.}3.$