3) A forecasting system with trend has been installed in a company. Prior to the current quarter (beginning of quarter 5) most recent values of the forecast parameters are as follows: slope (trend factor): 10.4, intercept (level factor): 110, and all smoothing parameters are 0.15. a) What is the forecast for quarter 5 and quarter 6? b) The current quarter's (quarter 5) demand is realized and is 80 units. Update all the factors. c) What is the MAD value computed for quarter 5? If smoothing approach is used to update MAD values, what is the new MAD value if the most recent MAD value was 15? Note that all smoothing parameters are 0.15(even if it was not covered in class, read the related section covered in the text before answering).