Upon treatment with HBr,I,3-butadiene gives two products, 5 and 6. It is found experimentally that 5 is formed faster than 6. HBr 1,3-butadiene (a) Write a mechanism that accounts for the formation of both 5 and 6 from I,3-butadiene under these conditions. (b) Which product do you expect to be more stable? Why? (c) Construct an energy vs reaction progress diagram for the reaction shown above. (d) On your diagram label the one energy difference that determines the ratio of 5 and 6 under conditions of kinetic control. (e) On your diagram label the one energy difference that determines the product ratio of 5 and 6 under conditions of thermodynamic control. (g) Provide a mechanism for interconversion of 5 and 6 (you can write the mechanism in either the 56 or 65 direction)