lab experiment of gas chromatography in orange peel

1) If orange oil is comprised of only one compound, how would that be illustrated with the GC? 2) If the orange oil was contaminated with hexane, how would that have appeared in the GC? 3) The two possible components of orange oil could have been R-limonene and S-limonene. If we had a bottle of each of these and a good sample of orange oil, how could we determine which enantiomer makes up orange oil? 4) If we were to run the lab again, what changes would you make to be more successful