In a business, it is desired to forecast demand for the 8th period by using the demand data recorded for 7 periods. The table below shows the data. It is considered to use one of the two-period or four-period simple moving average methods in the enterprise. Accordingly, the MAD value of the two-period simple moving average management Gap 1. Fill in the blanks, read the relevant text. , the MAD value of the simple four-period moving average method Space 2. Fill in the blanks, read the relevant text. Blank 3. Fill in the blanks, read the relevant text. The one-period simple moving average method should be chosen. If this method is used, forecast demand for period 8 Gap 4. Fill in the blanks, read the relevant text. There will be a thousand. Note: Use one decimal place in calculations and in the presentation of the result. Use a period (.) as a decimal separator. In a business, it is desired to forecast demand for the 8th period by using the demand data recorded for 7 periods. The table below shows the data. It is considered to use one of the two-period or four-period simple moving average methods in the enterprise. Accordingly, the MAD value of the two-period simple moving average management Gap 1. Fill in the blanks, read the relevant text. , the MAD value of the simple four-period moving average method Space 2. Fill in the blanks, read the relevant text. Blank 3. Fill in the blanks, read the relevant text. The one-period simple moving average method should be chosen. If this method is used, forecast demand for period 8 Gap 4. Fill in the blanks, read the relevant text. There will be a thousand. Note: Use one decimal place in calculations and in the presentation of the result. Use a period (.) as a decimal separator