The monthly sales of a new business software package at a local discount software store were as follows: week 1 2 3 4 5 6 7 8 9 10 sales 460 415 432 450 488 512 475 502 449 486 1. plot the data and provide insights about the time series. 2. find the best number of weeks to use in a moving average forecast based on mse. 3. find the best single exponential smoothing model to forecast these data.