Actual demand for periods $1-4$ and the forecast for periods $1-4$ is shown below.

Calculate the MSE $($mean squared errors$).$

$\backslash$table$[[$Period$,$Actual,Forecast$],[1,1,002,1,007],[2,1,019,1,011],[3,1,030,1,031],[4,1,034,1,041]]$

Round your answer to two decimal points.