How would I make arms and legs invisible through a script?

I already know how to make the head and torso invisible, so I need to know what to put into the line. I've tried "Left Leg", "Lleg", etc.

For example, instead of having "Torso" in this line I want to figure out how to make the arms or legs transparent.

char.Torso.Transparency = 1

Thanks.

character['Right Arm'].Transparency = 1

or

character:FindFirstChild('Right Arm').Transparency = 1