molecule 3d model

. Draw 3D representations of molecules that illustrate the spatial arrangement of atoms for all the possible stereoisomers of the following compounds. Label pairs of enantiomers, and meso compounds. Specify which isomers, if separated from stereoisomers, will be optically active. Give one isomer for each set its absolute configuration. [21] a) C6H5CH(CH3)CH(CH3)C6H5 b) CH3CH(C6H5)CHOHCH3 c) HOCH2(CHOH)3CH2OH in dicate which one is a,b,c