Diego and Bradley began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Diego took a test in Math and earned a 73, and Bradley took a test in Social Studies and earned a 60.8. Use the fact that all the students' test grades in the Math class had a mean of 73.2 and a standard deviation of 11.8, and all the students' test grades in Social Studies had a mean of 64.4 and a standard deviation of 10.4 to answer the following questions. a. Calculate the Z-score for Isaac's test grade.
b. Calculate the 2-score for lan's test grade.
c. Which person did relatively better?