Angelo and Regina began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Angelo took a test in Science and earned a 80.5, and Regina took a test in Art History and earned a 66.8. Use the fact that all the students' test grades in the Science class had a mean of 73.4 and a standard deviation of 9.6, and all the students' test grades in Art History had a mean of 63.7 and a standard deviation of 10.3 to answer the following questions. a) Calculate the z-score for Angelo's test grade. 2 b) Calculate the z-score for Regina's test grade. 2 c) Which person did relatively better? Angelo O Regina O They did equally well.