1. In a Calculus class, 14 students failed due to poor attendance, 23 failed due to not studying, 15 failed because they did not turn in assignments, 9 failed because of poor attendance and not studying, 8 failed because of not studying and not turning in assignments, 5 failed because of poor attendance and not turning in assignments, and 2 failed because of all three reasons.
a. How many failed because of exactly two of the three reasons?
b. How many failed because of poor attendance and not studying but not because of not turning in assignments?
c. How many failed because of poor attendance and not turning in assignments but not because of not studying?