Five observations of bivariate data (x, y) are given in the table. X 7 8 12 6 4 V 20 16 7 17 23 (a) Find the value of Pearson's product-moment correlation coefficient. [2] (b) State what your answer to part (a) tells you about a scatter diagram representing the data. [2] (c) A new variable a is defined by a = 3x +4. Dee says "The value of Pearson's product-moment correlation coefficient between a and y will not be the same as the answer to part (a)." State with a reason whether you agree with Dee. ]