A customer comment phone line is staffed five days a week. Records are available that show the number of calls received every day for the last five weeks. Excel Data can be found in Data Tab/Sheet. a. Show a time series data plot of data and describe your observation in terms of pattern, trend, etc. b. Use a dummy variable method forecasting method to produce Week 6's Daily and total calls for week 6. Please also show the MAPE calculation c. Submit your Analysis and answers (in MS Excel Format)