A Diels-Alder reaction of 2,5-dimethylfuran and maleic anhydride gives a compound A that undergoes acid- catalyzed dehydration to give 3,6-dimethylphthalic anhydride. (a) Deduce the structure of compound A. Draw all non-bonding electrons (as applicable) (b) Give a curved-arrow mechanism for the conversion of A into 3,6-dimethylphthalic anhydride. The catalyst H2SO4 is abbreviated as "H-B" below and its conjugate base is abbreviated as B Follow the directions above each drawing box. First step: Delete/Add bonds to form A, Add 2 curved arrows to give...