The following time series data show the number of lightning strikes in a particular county for the most recent seven months.

Month $1234567$

Value $2110179162012$

$($a$)$

Compute MSE using the most recent value as the forecast for the next period.

MSE $=$

What is the forecast for month $8?$

$($b$)$

Compute MSE using the average of all the data available as the forecast for the next period. $($Round your answer to two decimal places.$)$

MSE $=$

What is the forecast for month $8?$