Question $4$: Variables important to the block on a ramp

Ramps A$-$D are of a block

initially at rest sliding down a

frictionless ramp. Heights and

horizontal lengths of the ramps

are provided in the table below. Rank the total work done by the net force for each block when it reaches the bottom of its ramp. Use the symbols or $=$ to indicate which are smaller, larger, or equal. Positive values are bigger than negative values. Show your work or explain your reasoning based on energy conservation.