Use the following sales data (Note: the same data set is provided in the first worksheet of the exam Excel file) to answer the question: It Demand 1 300 2 600 3 400 4 500 5 250 What will be the mean error and mean absolute deviation (calculated based on all five in-sample forecasts) if forecasts are calculated using the simple average technique? (Important Hint: use the answer to the previous question as the forecast for all five periods) O ME=112, MAD=0 O ME=112, MAD=112 O ME= -112, MAD=0 O ME=0, MAD=0 O ME=0, MAD=112