Kary took 4 courses last semester: History, Biology, Calculus, and Physics. The means and standard deviations for the final exams, and Kary's scores are given in the table below. Convert Kary's score into z scores.
Subject Mean Stand. dev. Kary's score Kary's z score
History 53 16 69
Biology 77 10 74.5
Calculus 70 12 88
Physics 60 14 67