5. *SOLVE USING ENERGY* A skier glides down a frictionless hill of 100 meters high, then ascends another hill, with a height of 90 meters, as shown in the figure below. a) What is the speed of the skier when they reach the bottom of the first hill (point B)? b) What is the speed of the skier when they reach the top of the second hill (point C)? c) check your answer in part b) with kinematic equation (full solution not required, just a calculation check with an equation) C 100 m 90 m B The skier moves from point A to point C