please answer all questions and show work

9. What is the best choice of reagent(s) to perform the following transformation? a. HO, SO b. Hg(OAc)2 and HO; followed by NaBH c. BHs; followed by HO, NaOH d. OsO4; followed by NaHSO3 10. Predict the major product for the following reaction. HO 11. What is the major organic product(s) obtained from the following reaction? Be sure to indicate stereochemistry, if applicable. OH 1. BH 2. H2O2 NaOH 12. For the following conversion, identify if the starting material has been oxidized, reduced or neither. Explain your answer. OH IV 13. Which one of the following compounds gives 5-methyl-3-heptanol with LiAlHa followed by water? ""