Paul made a diagram to compare and contrast radio waves that are used for communication and for broadcasting. which labels belong in the areas marked x, y, and z? x: may use lf, hf, and uhf waves y: travels at the speed of light z: may use mf and vhf waves x: travels at the speed of light y: may use lf, hf, and uhf waves z: may use mf and vhf waves x: may use mf and vhf waves y: may use lf, hf, and uhf waves z: uses radio waves with long wavelengths x: uses radio waves with long wavelengths y: may use lf, hf, and uhf waves z: may use mf and hf waves mark this and return