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20. Using curved arrows, show the deprotonation mechanism of phenol with hydroxide (OH). Also, provide the structure of the product of this deprotonation. 21. Provide valid resonance structures for the product of the previous question that show the charge moving onto the ortho- and para positions. Use curved arrow(s) in the structures to show how the charge resonates to the next structure in your scheme. Be sure to use all the proper notations for depicting resonance. 22. Using curved arrows, show the protonation mechanism of phenol with a proton (H+). Also, provide the structure of the product of this protonation. 23. Provide valid resonance structures for the product of the previous question that show the charge moving onto the ortho- and para positions. Use curved arrow(s) in the structures to show how the charge resonates to the next structure in your scheme. Be sure to use all the proper notations for depicting resonance.