2. Smoke is being emitted into the atmosphere from a smokestack. At any instant, the smoke -filled regions form as an inverted right circular cone, the height is 2 times the diameter. If the rate of smoke emission is 200 m3/min, how fast is the height increasing when the height is 75 m? 3. A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 15 cm/s. Find the rate at which the area within the circle is increasing after 5 s. If you could help with these two questions that would be awesome