a) Using the data from week 3 and 4, determine initial values of the intercept, slope, and seasonal factors for Winters' method. c_{l}=\frac{D_{i}}{V_{i}-[(N+1) / 2-j] G_{0}} \quad \text { for

}-2 N+1 \leq t \leq 0 ISYE 460 – Operations and Supply Chain Management Spring 2021 b) Assume that the observed demand for the first day of week 5 was 218. Using a = 0.2 and B = 0.15, and y = 0.10, update the estimates of the series, the slope and the seasonal factors. c) What are the forecasts made at the end of the first day of week 5 for the remaining three days of week 5?