Kaden and Lloyd began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Kaden took a test in Science and earned a 75.1, and Lloyd took a test in English and earned a 61.6. Use the fact that all the students' test grades in the Science class had a mean of 71.8 and a standard deviation of 10.6, and all the students' test grades in English had a mean of 60.2 and a standard deviation of 9.8 to answer the following questions.

a) Calculate the z-score for Kaden's test grade. z = [Round your answer to two decimal places.]

b) Calculate the z-score for Lloyd's test grade. z = [Round your answer to two decimal places.]