A rollercoaster has a first hill that is $160\mathrm{.}0$ m high. The roller coaster cart is going $25\mathrm{.}0$ m$/$s at the top of the second hill. No$,$ you are not provided with the mass of the roller coaster cart.

Use energy concepts to find the speed of the cart at the bottom of the first hill?

Use energy concepts to find the height of the second hill?