Using the data below, calculate the squared error for the $4$ th week. Use the $2$ period moving average to create the forecast.

Week

Time Series Value

$1$

$22\mathrm{.}00$

$2$

$12\mathrm{.}00$

$3$

$16,00$

$4$

$1300$

Answer format: Number Round to: $1$ cecimal places.