Exponential Smoothing Forecast | Forecast Errors, Absolute Errors, MAD, MSE, MAPE | ShinStats

Exponential Smoothing Forecast | Forecast Errors, Absolute Errors, MAD, MSE, MAPE | ShinStats
Challenge:
Given the weekly demand data, what are the exponential smoothing forecasts for Periods 2-10 using:
(Assume the first forecast value to be equal to the first demand value of 820)
A) 𝛼=0.10
B) 𝛼=0.60
In addition, calculate the associated forecast errors, absolute errors, mean squared error, and mean absolute percentage error.