Using a $3-$month moving average, the forecast value for October made at the end of September in the following time series would be:

July $12$

Aug $5$

Sept $7$

Oct $11$

Question $4$ options:

$1)$

$7\mathrm{.}67$

$2)$

$8$

$3)$

$9$

$4)$

$6\mathrm{.}89$