S- For the four compound below, Express E or Z, showing substituted group priority as low or high? 6- The reaction below gives three different product by elimination in different precentage, explain the reason and why the middle one is major product? 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