Please show handwritten calculations for each.

5. [20 points) Bus and subway ridership in Washington, D.C., during the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the following data have been obtained: YEAR 1 2 3 4 6 7 8 9 10 11 NUMBER OF TOURISTS (1,000,000s) 6 12 14 20 15 RIDERSHIP (100,000s) 15 10 13 15 25 24 20 27 2 3 5 12 7 2 4 14 16 15 27 7 17 44 34 a. Calculate the values of rand for this model. Interpret the value of r in the context of this problem. b. Develop a regression model. c. What is expected ridership if 10 million tourists visit the city? d. If there are no tourists at all, explain the predicted ridership