A Salary Survey (fictional) for Texas A&M University graduates (less than 5 years of work experience) reveals that, the Bachelor of Science graduates' annual average salary is $70,439 with a standard deviation of $11,080; the Master of Science graduates earn an average of $81,672 per year with a standard deviation of $9,080. Assume the data follows a Gaussian distribution. Answer the following questions: a) What is the percentage of BS graduates who earn more than the average of MS graduates? b) What is the percentage of BS graduates who earn more than the 90% of MS graduates?