The chart shows data for four heat engines.

A 3 column table with 4 rows. The first column is labeled heat engine with entries W, X, Y, Z. The second column is labeled T Subscript h Baseline in Kelvin with entries 620, 840, 900, 500. The last column is labeled T Subscript c Baseline in Kelvin with entries 120, 100, 300, 25.

Which lists the engines from most efficient to least efficient?

Y, X, W, Z
Z, W, X, Y
Z, X, W, Y
Y, W, X, Z