A large number of applicants for admission to graduate study in business are given the GRE test. Scores are normally distributed with a mean of 550 and standard deviation of 70. Answer the following questions.(Show work for partial credit in case your answer is wrong)

a) What percentage of applicants will score more than or equal to 650?

b) What is the least score the applicants would need to get to score in the top 2.5%?

c) Find the first quartile of scores (Q1 marks the first 25% area).