In the image below, an intrepid explorer is pulling her trusty canine companion with constant speed across the frozen arctic wilderness. The child's mass is m = 13 kg, and the mass of the dog+sled is m = 25 kg. The rope makes an angle of 0 = 34 above the horizontal, and the child maintains a constant tension of T = 15 N in the rope. This is as hard as she can pull on the rope without her boots slipping on the surface of the snow. Image source: farmandfleet.com (a) Draw two separate free-body diagrams: one for the child, and one for the dog+sled. (b) Calculate the coefficient of friction between the child's boots and the snow. Be sure to state whether you've calculated the coefficient of static friction or the coefficient of kinetic friction. (c) Calculate the coefficient of friction between the sled and the snow. Be sure to state whether you've calculated the coefficient of static friction or the coefficient of kinetic friction. (d) A vicious polar bear begins charging toward the child and her dog. She quickly switches into more rugged winter boots that allow her to accelerate forward with a magnitude of 1.5 m/s, while still towing the dog and without her boots slipping. What is the tension in the rope now? (Assume that the rope's angle is still 34.)