please help!!!

Since we did not perform this experiment individually, the lab report will consist in answering these questions: 1. Why do you mark your TLC plate with pencil, rather than pen? 2. Jo College misread the instructions and put 2cm of ethyl acetate in the 400mL beaker. The liquid level was above the level of the spots on the TLC plate. Wil Jo get valid data? Explain. 3. Explain why the solvent moves upward in thin layer chromatography. 4. Consider this the plate: a) Calculate the Rf of each compound, \#1, \#2, \#3, and \#4. (You do not have to do Rf for the Unknown.) b) Which components are in the Unknown? c) Which compound has the greatest tendency to go into the solvent? Explain how you got your