Consider the following time series data: 1 2 3 4 5 6 7 26 15 22 14 21 25 17 PART 1.Compute MSE using the most recent value as the forecast for the next period and then calculate the forecast for month...

Consider the following time series data:

PART 1.Compute MSE using the most recent value as the forecast for the next period and then calculate the forecast for month 8.

PART 2.Compute MSE using the average of all the data available as the forecast for the next period. What is the forecast for month 8?