A Ball Is Thrown Straight Down from the Top of a 220-Ft

A ball is thrown straight down from the top of a 220-ft building with an initial velocity of -16 ft per second. The position function is . What is the velocity of the ball after 4 seconds? ​

A) The velocity after 4 seconds is -80 ft per second.
B) The velocity after 4 seconds is -112 ft per second.
C) The velocity after 4 seconds is -144 ft per second.
D) The velocity after 4 seconds is -48 ft per second.
E) The velocity after 4 seconds is -288 ft per second.