The Graduate Record Examination (GRE) is a standardized test which is the requirement for many graduate schools in the United States and Canada. GRE is constructed so as to have a normally distributed score with a mean of 300 and standard deviation of 10. (To answer this question, you also need to use Z-table provided in this course). a) Ryan got his score at the 80" percentile. What is Ryan's GRE score? b) What is the probability that a randomly picked student getting a score lower than 280