Please help me with this problem I been stuck in this problem for 45 min and don't know how to go about it ????

6. In 1994, the average score for the Verbal SAT was 500 with SD of 110. Determine the following: (a) the percentage of students that scored 600 or more on the Verbal SAT, (b) the percentage of students that scored 378 or less on the Verbal SAT, and (c) the percentage of students that scored between 450 and 600 on the Verbal SAT. You must provide computations to justify your answer. 2