Weekly sales for watermelons over the summer at a local produce stand exhibit a linear trend. The demand for weeks 1 through 10 was 91, 94, 95, 97, 92, 101, 107, 116, 113, and 121.
a) Calculate the forecasts for weeks 2 through 10 using Holt’s double exponential smoothing with ? = 0.05 and ? = 0.10.
b) What is the multiple-step ahead forecast for period 12 created at the end of period 10?
c) What is the multiple-step ahead forecast for period 12 created at the end of period 6?