After using a $3-$week SMA,$$what is residual for month $4?$

Month

Units Sold

$1$

$8$

$2$

$3$

$3$

$4$

$4$

$5$

$5$

$12$

$6$

$10$

$7$

$$

Group of answer choices

Cannot be determined based on the given information.$$

$7$

$0$

$4$