Finish editing and reproducing figures from Ch 7

[ebridge2]

• [x] Section 1
• [x] Section 2
• [x] Section 3
• [x] Section 4
• [x] Section 5
• [x] Section 6

[ebridge2]

• [x] Revise figures again

[ebridge2]

@loftusa make sure that textbook_figs manuscript for this section works