Four Balls Are Thrown Off the Top of a Building $\circ$

Four balls are thrown off the top of a building 27 m high.All balls are thrown with identical speeds,but at different angles.Ball 1 is thrown straight upward.Ball 2 is thrown +30 ^$\circ$ relative to the horizontal.Ball 3 is thrown at an angle of +45 relative to the horizontal.And Ball 4 is thrown at an angle of -45 ^$\circ$ relative to the horizontal.Which ball has the greatest kinetic energy at the top of their respective paths?

A) ball 1
B) ball 2
C) ball 3
D) ball 4
E) All have the same kinetic energy