(a) Using a moving average will unice periods, pre dict the demand for vacuum cleaners for next February. (b) Using a three-period weighted moving average d. bre with weights 3, 2, and 1, predict the demand for vacuum cleaners for February. (c) Evaluate and comment on the accuracy of each of these models. : 5-33 Consulting income at Kate Walsh Associates for the period February-July has been as follows: liy Hidd. to vio s 18 .me380 ,Ee Le MONTH INCOME ($1,000s) February YBDT- 70.0 gnieu vsbol on March of dgirl sdi 68.5 LOT (6) Aprilove gnivom 64.8 wl s gnieu yBbol May oqmel dgid adj 71.7 June beds not ary 71.3 July ageuses guivorn 72.8 1016199 Use exponential smoothing to forecast August's in- come. Assume that the initial forecast for Febru- ary is $65,000. The smoothing constant selected is a = 0.1. I sli omuzzA . VI-e mold 5-34 Resolve Problem 5-33 with a = 0.3. Using MAD doom which smoothing constant provides a better forecast. 5-35 A major source of revenue in Texas is a state sales tax on certain types of goods and services. Data are com piled, and the state comptroller uses