1) You react (E)-27-dimethyl-4-octene with bromine collect product and thenperform a second reaction with potassium hydroxide.a) Show the entire mechanism for these reactions.b) Given the following masses for starting material intermediate and finalproduct (2.0g/4.26g/1.66g) calculate the percent yield for step 1 step 2 and theoverall reaction.c) Given the following melting point data for the intermediate and product brieflycomment on purity. (intermediate: 166-170C product: 145-155C)2) Acetone and propanal react via an aldol condensation in the presence ofsodium hydroxide and then heat. Show the four possible products and themechanisms that lead to each one.3) You wish to synthesize 11-diphenyl-1-propanol via Grignard technique.a) Show two possible synthetic pathways along with their mechanisms. One ofthem should involve a ketone or aldehyde as a substrate and the other shouldinvolve an ester substrate. Make a claim as to which is the more desirablesynthetic pathway.b) Show what would happen if your Grignard reagent came into contact withwater. For this reason what precautions must be taken when performing aGrignard reaction?