Answer
Please see the image.
Work Step by Step
The thing to realize is that D-F are no longer in one group, so you will need to add another branch point (6), leaving the bottom half of the diagram very closely resembling the top half.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.