CIS335 3.4 Lab: Creating a Forecast with Amazon Forecast Task 3, Out[50]: What does the forward-fill process do to the existing data? Why might you want this? Task 6, Out[57]: What do you notice about the StockCode column? What does this mean? Task 6, Out[67]:Comparing the results of the P10, P50 and P90 prediction models, what do you observe? Do any one of the three stand out as the "best predictor" against the actual results? Why or why not