The monthly sales for Yazici Batteries, Inc., were as follows:

$\backslash$table$[[$Month$,$Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sept,Oct,Nov,Dec$],[$Sales$,19,23,15,15,13,15,17,18,22,22,21,24]]$

This exercise contains only parts $b$ and $c.$

b$)$ The forecast for the next month $($Jan$)$ using the naive method $=$ sales $($round your response to a whole number$).$

The forecast for the next period $($Jan$)$ using a $3-$month moving average approach $=$ sales $($round your response to two decimal places$).$ your response to one decimal place$).$

Using exponential smoothing with $=0\mathrm{.}40$ and a September forecast of $18\mathrm{.}00,$ the forecast for the next period $($Jan$)=$ sales $($round your response to two decimal places$).$

Using a method of trend projection, the forecast for the next month $($Jan$)=$ sales $($round your response to two decimal places$).$

c$)$ The method that can be used for making a forecast for the month of March is