7- Write something or give an example for each terms: Rearrangement in a reaction, hydride migration, methyl migration, Markovnikov rule, beta-elimination, nucleophilic substitution, addition reaction, dehydration reaction, electrophile, nucleophile, resonance, tautomer, carbanion, carbocation, en-ol, ether, Use very short expalanation for the answer. 8-Compare and give density, solubility and boiling point order for organic compounds