A block of mass \(m\) is released from rest at the top of an incline of height \(h\) and length \(L\). A constant frictional force of magnitude \(f\) acts on the block as it slides to the bottom. Consider the following two systems:

System 1: The block and Earth.
System 2: The block, Earth, and the incline.

Which of the following correctly describes the energy of these systems as the block slides from the top to the bottom of the incline?