(a) For each of the following compounds: 1. Draw three-dimensional (dash wedge) perspective structures. 2. Label any chiral centers. (i) (S)-2-chlorobutane (ii) (R)-2,2,3-trimethylpentane (iii) meso-3,4-hexanediol (iv) 2,2-dihydroxyethane (b) For each of the compounds given in part (a): (i) Does the compound have a plane or center of symmetry? If so draw it; (ii) Does the structure have an enantiomer? If so draw it; (iii) Does the compound have a diastereoisomer? If so draw it. (iii) Label each structure as chiral or achiral. (iv) Draw the Fischer projections for two of them