a) Draw the skeletal structure of meso-3,5-dibromo-3,5-dimethylheptane. (Show one wedge bond, one dashed bond, and two sticks attached to the chiral carbon. Show the hydrogen atom bonded to the chiral carbon atom as either a wedge or dash to establish stereochemistry. Do not show other hydrogen atoms. )
b) Draw the skeletal structure of (2S,6S)-2,6-diaminopimelic acid ((2S,6S)-2,6-diaminoheptanedioic acid). (Show one wedge bond, one dashed bond, and two sticks attached to the chiral carbon. Show the hydrogen atom bonded to the chiral carbon atom as either a wedge or dash to establish stereochemistry. Do not show other hydrogen atoms.)