A forensic scientist investigated an ink sample from a suspected counterfeit document. The ink contained a mixture of orange and green dyes. The analysis was conducted using two different types of chromatography paper, Grade X and Grade Y.
The table below shows the results of the chromatography experiment:
| Chromatography Paper | Dye | Distance moved by dye (cm\text{cm}cm) | Distance moved by solvent (cm\text{cm}cm) | Rf R_f\,Rf value |
|---|---|---|---|---|
| Paper Grade X | Orange | 3.6 | 12.0 | 0.30 |
| Paper Grade X | Green | 9.0 | 12.0 | 0.75 |
| Paper Grade Y | Orange | 4.2 | 12.0 | 0.35 |
| Paper Grade Y | Green | yyy | 12.0 | 0.80 |
Calculate the distance moved by the green dye on Paper Grade Y, represented by yyy.
Explain which chromatography paper (Paper Grade X or Paper Grade Y) has a stronger attraction to the orange dye, using the Rf R_f\,Rf values from the table.