The moleceule 2,5-dibromohex-3-ene contains three stereogenic sites: a double bond that can be cis- or trans- and two chirality centers that can be either (R) or (S). Draw structures for and name all possible stereoisomers of 2,5-dibromohex-3-ene. That means 23 stereoisomers, but there's also the potential for high symmetry or meso stereoisomers, which reduces the total number of possibilities. Put boxes around pairs of enantiomers, and label meso if appropriate