$1.$The Smoothed Average in period $62.$The Forecast in period $103.$The demand in period $114.$The Trend in period $145.$ Find the Error in Period $20\mathrm{.}6.$ Using the trend adjusted model above, with the alpha and beta values provided, develop a forecast for period $28.7.$ Using the data in the model, develop a six period moving average for period $26.8.$Using the data in the model, develop a forecast for period $27$ using a weighted moving average model with weights of $0\mathrm{.}5,0\mathrm{.}2,0\mathrm{.}2,0\mathrm{.}1($with the first weight on the most recent data$).9.$Calculate a bias based on periods $16$ to $20.$