Step 1: Analyze the reaction steps.
The reaction proceeds by oxidation and the resulting products are hydroxyl groups, finally forming a methylated product.
Step 2: Conclusion.
Thus, the correct structures of F, F, and G are Ph - OH, F - OH, and G - CH\(_3\).
Final Answer:
\[
\boxed{\text{Ph - OH, F - OH, G - CH}_3}
\]