4. Using (E)-buta-1,3-dienylbenzene (shown below) as starting material, plus any other reagents needed (except the product!), show how you would synthesize FOUR of the five products named in a-e. OMIT ONE! If you answer all five, the last one will not be graded. DO NOT SHOW MECHANISMS. ( 5 pts. each) a. (E)-1-(buta-1,3-dienyl)-4-propylbenzene . (E)-4-(buta-1,3-dienyl)aniline c. (E)-(1-bromobut-2-enyl)benzene d. butylbenzene e. benzoic acid 4. Using (E)-buta-1,3-dienylbenzene (shown below) as starting material, plus any other reagents needed (except the product!), show how you would synthesize FOUR of the five products named in a-e. OMIT ONE! If you answer all five, the last one will not be graded. DO NOT SHOW MECHANISMS. ( 5 pts. each) a. (E)-1-(buta-1,3-dienyl)-4-propylbenzene . (E)-4-(buta-1,3-dienyl)aniline c. (E)-(1-bromobut-2-enyl)benzene d. butylbenzene e. benzoic acid