There are two colleges within the same city. College 'A' grades students on a 4.0 scale and college 'B' grades students on a 5.0 scale. John graduated from college 'A' with a GPA of 3.6000 / 4.000 and Mary graduated from college 'B' with a GPA of 4.000 / 5.000. This year, the mean GPA for graduates of college 'A' was 3.5 with a standard deviation of 0.75; the mean GPA for graduates of college 'B' was 3.8 with a standard deviation of 0.85. Assuming that both colleges are equally ranked, draw students from the same population, and have similar admissions standards, which student, John or Mary, graduated higher in his/her class?