What type of pattern exists in the data?

b$.$ Compare the three$-$month moving average approach with the exponential smoothing approach for $=0\mathrm{.}2($to $2$ decimals$).$ Round intermediate calculations to $2$ decimal places.

Which provides more accurate forecasts using MSE as the measure of forecast accuracy?

$$ provides the most accurate forecast using MSE.

c$.$ What is the forecast for next month $($to $1$ decimal$)?$