Express each of these statements using predicates and quantifiers.
a) a passenger on an airline qualifies as an elite flyer if the passenger flies more than 25,000 miles in a year or takes more than 25 flights during that year.
b) a man qualifies for the marathon if his best previous time is less than 3 hours and a woman qualifies for the marathon if her best previous time is less than 3.5 hours.
c) astudentmusttakeatleast60coursehour s, oratleast 45 course hours and write a master’s thesis, and receive a grade no lower than a b in all required courses, to receive a master’s degree.
d) there is a student who has taken more than 21 credit hours in a semester and received all a’s.