QUESTION 5 (20 Marks) Use the information provided below to answer the following questions. As a demand planner at Groolegeluk Mine, you want to determine the monthly sales forecast of coal lin tormesi. Table 1, below, depicts the volume of coal sold by the mine for each of the 12 months of 2022 . Table 1: Valume al enal enil manthlu thurinn 2022 REQUIRED: Using the data provided in Table 1, answer each of the following questions: 5.1. Using the three-month weighted moving average method, calculate the monthly forecasts far April 2022 to January 2023 by assigning weights of 0.1,0.3 and 0.6 (the oldest data to the most recent data, respectively! RRound off forecas! (10 marks) values to one decimal place). 5.2. Caiculate the mean absolute deviation (MAD) of the forecasts for April 2022 to December 2022 (Round of the (5 marks) answer to two decimal place). (3356(6) culate the mean absolute percentage error (MAPE) of the forecasts for Apri 2022 to December 2022 (Round off sthe answertotwo decimal place). shot with my Galaxy A 23 preci END OF PAPER