For the circlex^2+y^2=25, (x squared plus y squared equals twenty-five)

A. Find the points at whichdy/dx=0. Enter your answer as a list of coordinates. dx/dy=0 at _______________

B. If the radius starts increasing at a constant rate of1 cm/sec, how fast is the area increasing when r=6cm?

The area is increasing at________square cm per second.