2. What is your observation in the following reactions? Write the structure of the product when possible. (10 Marks) a) Adding methyl benzoate to Ag /NHs mixture. b) Adding propiophenone to 2.4-dinitrophenylhydrazone. c) Adding 2-octanone to a mixture of 13 in NaOH. d) Adding butanal to Schiff's reagent. e) Adding NaBH, to benzaldehyde and then performing TLC test