A judgment is analytic if it is not synthetic. Synthetic judgments provide us with non-definitional information about the subject. These statements tell us something about dogs, swans, or triangles which might some day be very important to know. It is an epistemological distinction. It is made by thinking or reasoning about the matter in question without an appeal to facts.
All bachelors are unmarried men.
Any statement which is not a priori is a posteriori. Such statements have no necessity or universality. No analytic statement is a posteriori. A Sophomore is in her second year of course work. For example, factual statements, theories of the physical sciences.