Can someone help me solve this problem.

A. A painter is paint a house using a ladder 15ft long. A dog runs by the ladder dragging its leash that catches the bottom of the ladder and drags it directly away from the house at a rate of 22ft/sec. Assuming the ladder continues to be pulled away form the wall at this speed, how fast is the ladder moving down the wall when the top is 5ft from the ground?

B Find how fast the angle between the ladder and the ground is changing when the top of the ladder is 5ft from the ground?