Draw the product of the following reactions and indicate whether the product would be (R), (S), racemic, or achiral. You do not have to draw a projection that shows the configuration; you can just use the label
1.) (R)-2-butanol + conc. H2SO4, heat, then HBr ---> ???
2.) (R)-2-butanol + PBr3 ---> ???
3.) (R)-2-butanol + CH3-C6H4-SO2Cl, then Br ---> ???