The attached image shows the outcome of a Stern-Gerlach experiment with atoms of an unknown element X. part a) Do the peaks represent different values of the atom's total angular momentum or different values of the z-component of its angular momentum? Explain. part b) What angular momentum quantum numbers characterize these four peaks? List them in order from top to bottom in the picture.

The attached image shows the outcome of a Stern-Gerlach experiment with atoms of an unknown element X. part a) Do the peaks represent different values of the atom's total angular momentum or different values of the z-component of its angular momentum? Explain. part b) What angular momentum quantum numbers characterize these four peaks? List them in order from top to bottom in the picture.