The supervisor of a commuter airline is scheduling pilots to fly the round-trip from City X to City Y. The trip takes only two hours, and the airline has one round-trip flight in the morning and one round-trip flight in the afternoon, each day, Monday through Friday. Pilots must be scheduled in accordance with the following rules:

Only W, X, and Y can fly the morning flight.
Only V, X, and Z can fly the afternoon flight.
No pilot may fly twice on the same day.
No pilot may fly on two consecutive days.
X must fly the Wednesday morning flight.
Z must fly the Tuesday afternoon flight.

1.Which of the following must be true?
A. W flies the Monday morning flight
B. X flies the Monday afternoon flight
C. Y flies the Tuesday morning flight
D. W flies the Thursday morning flight
E. Z flies the Thursday afternoon flight

2.If X flies on Friday morning, which of the following must be true?
A. X does not fly on Monday afternoon
B. V flies on Friday afternoon
C. W flies Thursday morning
D. Y flies Thursday morning
E. Neither W nor Y flies Thursday morning

3.If X flies only one morning flight during the week, which of the following must be true?
A. W flies exactly two days during the week
B. X flies exactly three days during the week
C. Y flies only one day during the week
D. Z flies Monday afternoon and Friday afternoon
E. X flies more times during the week than V

4.If W is not scheduled to fly at all during the week, all of the following must be true EXCEPT
A. X flies on Monday morning
B. V flies on Monday afternoon
C. Y flies on Thursday morning
D. Z flies on Friday afternoon
E. X flies on Friday morning