5. Listed below are the number of United Methodist church members (in millions) in the United States in the provided years since 1960. Note for 1960, x = 0. Years since 1960, x 0 10 20 30 40 50 Million members, y 10.6 10.7 9.5 8.9 8.4 7.7 a) Find and state the value of the sample correlation coefficient, r, to 3 significant digits. Find and state the critical value at a significance level of a = 0.05. Then determine and tell whether there is a significant linear correlation between the two variables. (5 points) b) State the equation for the least-squares regression line. (3 points) c) Use the regression equation to predict the number of United Methodists in the year 2020. Round to the same place value as the data. Include units. (2 points)