Community General Hospital finds itself treating many bicycle accident victims. Data from the last seven $24-$hour periods is shown below:

$$

Day Bicycle Victims

$16$

$28$

$35$

$48$

$59$

$69$

$78$

$$

What is the Mean Square Error $($MSE$)$ for the $3-$period moving average forecasts for days $4$ through $7?$

Group of answer choices

$3\mathrm{.}83$

$2\mathrm{.}50$

$6\mathrm{.}72$

$4\mathrm{.}52$