scores is a 2-D list (students × subjects). Write subject_means(scores) returning each subject's mean rounded to 1.
subject_means([[80, 70], [90, 75], [70, 95]]) → [80, 80]
subject_means([[1, 2, 3]]) → [1, 2, 3]
Submit runs 3 tests, including hidden edge cases.
Run your code to see the output here.