umber of computer sold at a store was recorded as 2,1,5,3,7 per week for five weeks. ssuming that there is no trend: (a) Write the equation for the model for forecasting by defining each component of the time series model model. (b) What assumption would be made to estimate the model in part (a) by least squares method. (c) Estimate the model of part (a) using the above data. (d) Make the forecast of sales for weeks seven and week eight. (e) Compute prediction interval for your forecast of week eight. (f) Compute MAD. (g) Compute MAPE. (h) Compute Durbin Watson d statistic. (i) Compute Autocorrelation and make forecast for week six by assuming the bbservations are auto-correlated. umber of computer sold at a store was recorded as 2,1,5,3,7 per week for five weeks. ssuming that there is no trend: (a) Write the equation for the model for forecasting by defining each component of the time series model model. (b) What assumption would be made to estimate the model in part (a) by least squares method. (c) Estimate the model of part (a) using the above data. (d) Make the forecast of sales for weeks seven and week eight. (e) Compute prediction interval for your forecast of week eight. (f) Compute MAD. (g) Compute MAPE. (h) Compute Durbin Watson d statistic. (i) Compute Autocorrelation and make forecast for week six by assuming the bbservations are auto-correlated