5. The following table list the midterm scores (x) and final exam scores (y) for a random sample of 10 students in Stat 141 X 60 88 67 91 81 93 78 90 75 48 V 48 74 54 62 75 49 60 84 81 47 The summaries of the data are given by 10, _ x: = 771, _ x - 61437, _ y. = 634, Ly? = 41992 ) xyl = 49855 (a) Given the summaries of the data, find the least-squares regression equation. (5 marks) (b) Graph the regression equation and the data points. (4 marks) (c) Interpret the slope and intercept of the regression equation in the context of the study. (4 marks) (d) Explain why the intercept is not of practical meaning with this particular model. (2 marks)