On an open field, a cannonball launches at an angle of 50° with respect to the ground. Some instant later, you observe that the cannonball is still in flight and on its way up. What can you affirm about the cannonball's velocity at that instant of time as compared to its initial velocity (at launch)? vx and vy stand for the x and y components of the cannonball's velocity, respectively (with x pointing parallel to the ground and y pointing up, as usual).

Choose the best answer and give a short explanation for your choice.

a. Both vx and vy have not changed.
b. Both vx and vy have increased.
c. vx has decreased and vy has increased.
d. vx has not changed and vy has decreased.
e. vx has increased and vy has not changed.
f. vx has increased and vy has decreased.