Chapter 8, Problem 58P

There are two dicarboxylic acids with the general formula $H{O}_{2}CCH=CHC{O}_{2}H$. One dicarboxylic acid is called maleic acid; the other is called fumaric acid. When treated with $Os{O}_4$, followed by $NaHS{O}_3/H_{2}O$, maleic acid yields meso-tartaric acid and fumaric acid yields $(\pm )$ -tartaric acid. Show how this information allows one to write stereochemical formulas for maleic acid and fumaric acid.