Q2. Self-reported scores in the final exam and time spent on Facebook (in hours per day) by few students are provided below. Scores 88 70 84 71 77 78 90 Time Spent on Facebook 1 8 4 10 7 9 2 (a) Why do you think that a linear regression model can be suitable for this data? (b) State a linear regression model with these two variables and describe a method to estimate the parameters of the model. (c) Calculate the coefficients and write the fitted regression line of exam scores on time spent 4 on Facebook. (d) Find the 95% confidence interval for the mean scores for students who spend 5 hours per 4 day on Facebook. Interpret your result