Courtney and Kathryn began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Courtney took a test in English and earned a 75.8, and Kathryn took a test in Art History and earned a 62. Use the fact that all the students' test grades in the English class had a mean of 74.4 and a standard deviation of 9, and all the students' test grades in Art History had a mean of 60.8 and a standard deviation of 8.9 to answer the following questions. a) Calculate the z-score for Courtney's test grade. [Round your answer to two decimal places.] b) Calculate the z-score for Kathryn's test grade. [Round your answer to two decimal places.] c) Which person did relatively better? Courtney O Kathryn They did equally well