A survey of a group of randomly selected students shows the following data comparing the number of hours per week spending on social media apps to their average marks: Hours Marks 11 84 10 5 12 22 3 11 21 19 4 14 81 93 86 71 98 87 66 77 91 83 a) Determine the correlation coefficient and classify the correlation. b) Can you make any conclusions about the effect of spending time on social media and student average marks? Explain. C) Using the equation of the line of best fit (found on the online calculator), estimate the mark of a student who spends 30 hours per week on social media.