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7. Complete the following reactions. Indicate stereochemistry when appropriate. (May require knowledge of previous chapters, including Organic Chemistry I)(: a) 2 1) Br2; hv 2) Mg: THF b) 1) KOH(alc)2)CHBr3;KOtBu c) 1) Li. THF 2) Cul 3) d) 1) Mg;Et2O 2) NH4Cl0 e) 1) HBr,ROOR 2) (C0H5)2CuLi