Marvin the tiny mammoth is roaming a glacier when he encounters a deep ravine that he cannot cross. Fortunately, the glacier is shaped as shown below. The bottom of the big hill is a circular segment of radius R. After Marvin takes a few careful measurements, he climbs the big hill to height h, and, starting from rest, slides down the frictionless hill and shoots across the ravine, just barely making it across. Marvin has mass m. You may neglect friction and drag in this problem. (a) (10 points) What is the magnitude and direction of the normal force when Marvin reaches the bottom of the jump (the point marked A) in the figure? Your answer may be expressed in terms of any of the variables given in the problem and any physical constants. (b) (5 points) What is Marvin's speed when he first becomes airborne (point B in thefigure)? Your answer may be expressed in terms of any of the variables given in theproblem and any physical constants. (c) (5 points) How high up the hill did Marvin start? Your answer may be expressed in terms of any of the variables given in the problem (except h) and any