please explain

Consider the energy efficiency of both the classical and green synthesis of 4-bromoacetanilide. Which reaction, the classical synthesis or the green synthesis is more energy efficient? Explain your answer. (2 points) NH2 NH Lei OH NH NH Brz + HBO Ac Br Scheme 7-1. Classical two-step synthesis of 4-bromoacetanilide from aniline. NH2 NH GLO + + H20 OH NH NH + NaBr + HOCI + NaCl + H2O ACOH/EVOH Br Scheme 7-2. Green synthesis of 4-bromoacetanilide from aniline