The Andes Mining Company mines and ships copper ore. The company's sales manager, Juanita Valdes, has been using the moving$-$average method based on the last three years of sales to forecast the demand for the next year. However, she has become dissatisfied with the inaccurate forecasts being provided by this method. The annual demands $($in tons of copper ore$)$ over the past $10$ years are $382,405,398,421,426,415,443,451,446,464.$

Determine the forecast for next year rounded to the nearest integer. $($Enter a numeric answer with no decimal point and no commas.$)$

$$

$\sqrt[A]{?}$

Question $2(0\mathrm{.}25$ points$)$

Determine the moving$-$average forecasts for the past seven years. Do not round your forecasts.

What is MAD? $($Enter a numeric answer rounded to the nearest integer with no decimal points and no commas.$)$

$$ A

Question $3(0\mathrm{.}25$ points$)$

What is MSE?

$($Enter a numeric answer rounded to the nearest integer with no decimal points and no commas.$)$

$$

A