Use the data below to determine each of the following: a.) Use the formula and/or spreadsheet to calculate the correlation coefficient and coefficient of determination. Show all work. b.) Use the linear regression formulas to determine the slope and y-intercept of the line of best fit. Show all work. Age Global Smallpox Vaccination Rate 10-10) [10-20) (20-30) 5% (30-40) 10% (50-60) (60-70) (70-80) [BO-80) 84%% (90-100)