Thousands of high school students take the SAT each year. The scores attained by the students in a certain city are approximately normally distributed with a mean of 490 and a standard deviation of 70. Find:

a. the percentage of students who score between 600 and 700

b. the percentage of students who score less than 650

c. the third quartile

d. the 15th percentile, P15

e. the 95th percentile, P95