Can you please answer demonstration 4

Thank you !!

Demonstration 4: The skateboarder now goes back on the ramp in Demonstration 1 shown again on the right. Something has happened to her wheels, and her skateboard now has significant friction. She glides down the ramp. As before, indicate with a letter from A to F on the diagram on the right the positions when her A. kinetic energy is maximum, B. kinetic energy is minimum, C. potential energy is maximum, D. potential energy is minimum, E. total energy is maximum, F. total energy is minimum. How will her speed at the bottom of the ramp compare to her speed in Demonstration 1, without friction? Only after you have made your predictions, use the Energy Skate Park: Basics simulation to make your observations. Select the correct ramp. First repeat Demonstration 1 (Friction is Speed set to None but with Speed meter also selected. Mark 1 on the speed meter on the right to indicate her speed at the bottom. Now set Friction to Lots, and repeat, marking the speed at the bottom on the speed meter with a 2. Also indicate your observations A to F on the ramp on the right in a different color ink. Compare your observations to your predictions and explain any differences. Is kinetic energy conserved? Is potential energy conserved? Is total energy conserved? What other form of energy must be included in Total Energy now, and how does it affect the kinetic energy of the skateboarder at the bottom