i need help with number 1 please

c Beta-carotene (Yellow to orange) HO Xanthophyll (Yellow) R -M9N HC Chlorophyll a, R = CH, (blue-green) Chlorophyll b, R = CHO (bright green) Figure 1. The structures of beta-carotene, xanthophyll, and chlorophylls a and b Questions: 1. Based on the structures shown in Figure 1, rank the four compounds in order of polarity (least polar to most polar), and then state the order of elution from the column. 2. Recall that a green band was left on the column. Why did that band remain on the column? What could you do in the procedure to elute that band? Dar in TIC