more How does this compare to PMS. 7. MBA salaries at Boston University. The file "BU MBA salaries.xlsx" contains data from four recent years for the MBA graduates at Boston University. The data includes their incoming GMAT score, their under- graduate GPA, the number of years of work experience they had, theSECTION 12. EXERCISES 131 MBA program they are applied to, their graduating GPA, a column called "OA at graduation" indicating whether or not they had accepted a job offer at graduation (1=yes, 0=no), a column called "OA at 90 days" indicating whether or not they had accepted a job offered by 90 days after graduation (1=yes, 0=no), a column indicating their grad- uating year, and a column with the salary of the job they took after graduation if they reported it. Salaries are listed as 0 if the student did not report their salary. Answer the following questions using R. (a) Draw histogram and compute the average salary for people who reported a salary and had a graduating GPA over 3.5. (b) Draw a histogram and compute the average salary for people who reported a salary and had a graduating GPA of 3.0 or below. (c) Using histograms, averages and standard deviations, do you see any interesting stories in these data