Chandran and Sergio began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Chandran took a test in Math and earned a 80.2, and Sergio took a test in English and earned a 63.7. Use the fact that all the students' test grades in the Math class had a mean of 70.2 and a standard deviation of 9.4, and all the students' test grades in English had a mean of 65.2 and a standard deviation of 8 to answer the following questions. a) Calculate the z-score for Chandran's test grade. 2 = b) Calculate the z-score for Sergio's test grade. 2 = c) Which person did relatively better? O Chandran O Sergio O They did equally well. Check Answer Screenshot