answer both questions please

The two TLC plates below were run on the mixture (M) isolated from the steam distillation of caraway.seeds. The reaction mixture was compared with authentic samples of carvone (C) and limonene (L). The distance for the carvone sample was 184.4mm. The distance for limonene was 22.5mm. The solvent front was found to be 403.2mm. Calculate the Rf of carvone. Simply enter the correct number. The two TLC plates below were run on the mixture (M) isolated from the steam distillation of caraway.seeds. The reaction mixture was compared with authentic samples of carvone (C) and limonene (L). Explain what the problem with Plate 1 might have been