Same time$-$series$-$data for questions with ID $$ IDF:

The number of pizzas ordered on Friday evenings between $5$:$30$ and $6$:$30$ at a pizza delivery location for the last $10$ weeks is shown below. Use exponential smoothing with smoothing constants of $0\mathrm{.}7$ to forecast.

$58,46,55,39,42,63,54,55,61,52$

What is the MSE using alpha $=0\mathrm{.}7?$