3. The County Transportation Department needs to determine usage factors by day of the week for a popular toll bridge connecting different parts of the city. In the current study, they are considering only working days. Suppose that the number of cars using the bridge each working day over the past four weeks were (in thousands of cars) Week 1 Week 2 Week 3 Week 4 Monday 16.2 17.3 14.6 16.1 Tuesday 12.2 11.5 13.1 11.8 Wednesday 14.2 15.0 13.0 12.9 Thursday 17.3 17.6 16.9 16.6 Friday 22.5 23.5 21.9 24.3 a) Find the seasonal factors corresponding to daily usage of the bridge. (show your calculation) 4 b) Thanks to advanced simulation techniques it is predicted that the total number of cars using the bridge in week 5 will be of 91.5 (in thousands of cars). What would the usage forecasts by day of the week (in thousands of cars) be in week 5? (show your calculation)