2. An Ice-cream seller observed the following demand with in 2 years: Year Quarter Period Demanding 90 150 2 3 240 60 2 1. NO 2 170 3. 260 At the end of the second year, he wants to forecast the demand for the next four quarters at the end of the second year a) Using the method simple moving averages if N-5, b) Using simple exponential smoothing if alpha-0.8 and the forecast for the current period is calculated as the mean of the three previous periods c) Using trend adjusted exponential smoothing if alpha-0.2 and beta-0.5, the level of the previous period (F.) is 120 and the trend of the previous period is assumed to be 0. d) Using trend and seasonality adjusted exponential smoothing if a-0.2, 1-0.4 and 7-0.25, the level of the previous period (F.) is 210, the trend of the previous period is 70 and the seasonality factors are S-0.48, S-0.55, S.-1.17, and S-1.8 2. An Ice-cream seller observed the following demand with in 2 years: Year Quarter Period Demanding 90 150 2 3 240 60 2 1. NO 2 170 3. 260 At the end of the second year, he wants to forecast the demand for the next four quarters at the end of the second year a) Using the method simple moving averages if N-5, b) Using simple exponential smoothing if alpha-0.8 and the forecast for the current period is calculated as the mean of the three previous periods c) Using trend adjusted exponential smoothing if alpha-0.2 and beta-0.5, the level of the previous period (F.) is 120 and the trend of the previous period is assumed to be 0. d) Using trend and seasonality adjusted exponential smoothing if a-0.2, 1-0.4 and 7-0.25, the level of the previous period (F.) is 210, the trend of the previous period is 70 and the seasonality factors are S-0.48, S-0.55, S.-1.17, and S-1.8