Please fill in blanks about energy and rollercoasters in physics . Thanks a lot

As the car starts to roll down the hill its starts to increase as the decreases. The total energy, still equal to remains constant through the trip. When the coaster is at the top of the second hill ( about half the height of the first), When the coaster has reached the bottom and is on a level surface the total energy is all in the form of Whether the car is going up or down, the KE is a positive value because energy is a quantity. It has no direction to it. . Remember that energy is defined as the ability to do and this can be done in any direction