L Question 2: (30 points total. 15 points each for a and b. You must show your work to get full credit.): For the data x= 1,4,7 , and y= 2, 7, 9 a.) Find the correlation coefficient r? What type of relationship does this represent? Explain. Show all work and calculations for credit. (Note: You must show all work in a handwritten manner. Please do not just use the "= correl (, )" in Excel to find correlation coefficient. However, you can use the "=correl () function in excel to check your answer.). b. ) Now find our r squared= coefficient of determination. Remember, r squared= (correlation coefficient r) * (correlation coefficient r). What does this number tell you in regards to our explanatory variable x and how it explains our response variable y