A Ladder Feet Long Is Leaning Against the Wall of a House

A ladder feet long is leaning against the wall of a house (see figure) . The base of the ladder is pulled away from the wall at a rate of feet per second. How fast is the top of the ladder
Moving down the wall when its base is feet from the wall? Round your answer to two decimal
Places.

A) $\quad 5.00 \mathrm { ft } / \mathrm { sec }$
B) $- 5.33 \mathrm { ft } / \mathrm { sec }$
C) $- 1.71 \mathrm { ft } / \mathrm { sec }$
D) $\quad 5.33 \mathrm { ft } / \mathrm { sec }$
E) $- 6.00 \mathrm { ft } / \mathrm { sec }$