There are 2 students in your class; one who is a hard-working straight a+ student and the other who is a slacker in class with grades of d/f. after an exam, the a+ student scores 99% and is pleading with you to get extra credit to get the full 100% in class. at the same time the slacker student who has a grade of an f is pleading to get extra credit to boost up his grade. you can only select one student to provide this opportunity to. who would you select and why?