In order to follow the structure of a Shakespearean sonnet correctly what must follow this quatrain a sextet an octave a fourth quatrain a rhyming couplet?

To follow the structure of a Shakespearean Sonnet correctly, a quatrain is followed by a sonnet. The quatrain is made up of four lines, and is followed by the two lines of a couplet. A sonnet consists of 14 lines in total, with a specific rhyme scheme and structure.