Draw the product formed when the alkyne below is treated with H₂, Pd/C.

Chemical structure of the product after hydrogenation of the alkyne.

Chemical structure of the product after further hydrogenation of the alkyne.

Chemical structure of the product after another hydrogenation step.

Chemical structure of the final product after complete hydrogenation.

Draw the product formed when the alkyne below is treated with H2, Pd/C.