Develop an exponential smoothing forecast (a 0.50) for periods 11 through 15. Assume that your forecast for period 10 was 296 = Period Demand 10 294 11 350 12 451 13 328 14 466 Calculate the forecasts for periods 11 through 15 (enter your responses rounded to two decimal places). Period Demand Forecast 10 294 296 11 350 12 451 13 328 14 466 15 Enter your answer in each of the answer boxes.