The question is below

Annotate the poem so that the sonnet's rhyme scheme is clear. Where does the scheme change- that is, where does the pattern of alternating pairs of lines whose last words rhyme (for example, in line 1-4 "sun," "red," "dun," "head," or ABAB) shift to a different pattern? How does the poem take advantage of this shift to make meaning in Sonnets 130?