Using a$3-$month moving$$ average, the forecast for periods $11$ and $12$ is $($round your responses to two decimal $$places$)$:

Month

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Forecast

$$$$1\mathrm{.}69$

$1\mathrm{.}69$

$1\mathrm{.}79$

$1\mathrm{.}90$

$1\mathrm{.}89$

$1\mathrm{.}82$

$1\mathrm{.}72$

$$

$1\mathrm{.}62$

$$

$1\mathrm{.}58$

Part $4$

$$c$)$ The mean absolute deviation based on a$2-$month moving average of March through December is $$$

$$

$.001($round your response to three decimal $$places$).$