Delta Corps plant in Austin has been experiencing imbalances in its inventory of components used in the production of a line of computer printers. Both stock shortages and overstock conditions are occurring. The production analysis group is studying the pattern of demand for component PS2400, a power supply used in many of Deltas products. The group believes that the most recent 12 weeks of demand for the PS2400 is representative of the future weekly demand: Week Demand (Units) Week Demand (Units) Week Demand (Units) Week Demand (Units) 1 159 4 161 7 203 10 168 2 217 5 173 8 195 11 198 3 186 6 157 9 188 12 159 Use a four-week moving average to develop a forecast of the demand for the PS2400 component in week 13. a. 178.25 b. 180.75 c. 175 d. 159