1. Answer the following questions pertaining to the reaction of maleic anhydride and 1,3butadiene: a) Specify the conformation required to enable a 1,3-diene to undergo the Diels-Alder reaction. ( 3 pts) b) Which conformation of 1,3-butadiene, s-cis or s-trans, is thermodynamically preferred a why? (3pts) c) Why does 1,3-butadiene react more rapidly with maleic anhydride than with another molecule of itself? ( 3 pts)