Question: Refer to the time series data in Problem 1. Using the average of all the historical data as a forecast for the next period, compute

Refer to the time series data in Problem 1. Using the average of all the historical data as a forecast for the next period, compute the following measures of forecast accuracy:
a. Mean absolute error
b. Mean squared error
c. Mean absolute percentage error
d. What is the forecast for week 7?

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