QUESTION 1 [8 points] The grades of 6 engineering students in two subjects, Structural Analysis (y) and Materials Science (x), are shown in the table. Materials Science () Structural Analysis (y) = 75 83 63 85 79 92 72 91 80 76 64 85 Note: y 36962, x = 38413, xy = 37329 A) Calculate the correlation coefficient between the grades of these 6 engineering students in Structural Analysis and Materials Science. [4 marks] B) Fit a straight line to the given data by the method of least square. [4 marks]