2 National Scan. Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows a) Forecast July sales volume using a four-month moving average at the end of June (details, please). Forecast August sales volume using a four-month moving average at the end of July (details, please). b) Forecast July sales volume using 3 -month weighted average with weights: 0.50,0.30, and 0.20 (Details, please). Forecast August sales volume using 3 -month weighted average with weights: 0.50,0.30, and 0.20 (Details, please). c) Forecast September sales volume using exponential smoothing with a smoothing constant equal to 0.10 , assuming a March forecast of 19(000). (Details, please) Forecast for April: Forecast for May: Forecast for June: Forecast for July: Forecast for August: Forecast for September