2 and 3 please!!

CHE 232 SP2023 Assignment 4 1. Molecule A is formed through an SN2 mechanism. Which pair of reactants would give the highest yield of molecule A Circle your answer. 2. Determine the best reagents for the reaction below. a) 1) NaOH2, 2) H2O b) 1) MeMgBr, 2) H2O c) [H2SO4] and H2O d) [H2SO4] and MeOH e) PCC1CH2Cl2 3. Why won't the reaction below proceed as written? Aor B? a) alkoxides are not strong enough nucleophiles b) isopropoxide is too sterically hindered to attack c) a stronger base is needed d) NaOH is a stronger nucleophile and will attack instead of propan-2-ol 4. Propionaldehyde (starting material) was treated with an unknown Grignard reagent and then water. The mass spectrum shows that the formula of product A is C5H12O. Product A has the following ' H NMR. Circle the correct structure on the right of product A