Draw a Fischer projection for each compound. Remember that the cross represents an asymm...

Draw a Fischer projection for each compound. Remember that the cross represents an asymmetric carbon atom, and the carbon chain should be along the vertical, with the IUPAC numbering from top to bottom.

(a) (S)-propane-1,2-diol (b) (R)-2-bromobutan-1-ol

(c) (S)-1,2-dibromobutane (d) (R)-butan-2-ol