Oleic acid and stearic acid are naturally occurring compounds, which can be isolated from various fats and

Question:

Oleic acid and stearic acid are naturally occurring compounds, which can be isolated from various fats and oils. In the laboratory, each can be prepared by hydrogenation of a compound known as stearolic acid, which has the formula CH3 (CH2)7CPC (CH2)7CO2H. Oleic acid is obtained by hydrogenation of tearolic acid over Lindlar palladium; stearic acid is obtained by hydrogenation over platinum. What are the structures of oleic acid and stearic acid?