12. [-/1.5 Points] DETAILS LARCALC11 1.5.507.XP.MI. MY NOTES ASK YOUR TEACHER A patrol car is parked d = 70 feet from a long warehouse, as shown in the figure below. The revolving light on top of the car turns at a rate of 1/2 revolution per second. The rate at which the light beam moves along the wall is r = 70x sec2 0 ft/sec. (a) Find the rate r when 0 is 7/4. (b) Find the rate r when 0 is /3 (c) Find the limit of r as 0-(7/2) -. Need Help? Read It Watch It Master It # Show My Work (Optional)