solve using sample standard deviation

Almost all medical schools in the United States require applicants to take the Medical College Admission Test (MCAT). On one exam, the scores of all applicants on the biological sciences part of the MCAT were approximately Normal with mean 9.7 and standard deviation 2. For applicants who actually entered medical school, rhe mean score was 10.8 and the standard deviation was 1.6. (a) What percent of all applicants had scores higher than 137 (b) What percent of those who entered medical school had scores between 9 and 12