Question 5. Provide plausible mechanistic rationales for the transformations shown below. Be sure to consider and include ereochemistry where relevant. Hechanism A: this mechanism requires a careful consideration of the stereochemical configurations of the stereocenters in e starting material and product. Me Me Me Meto May La gran nonna tee NaOH, OH OH OH nanism B: you may first be enticed to consider the high strain energy of the epoxide, but then again there is a mbered amide (B-lactam)...? You should weigh in our recent discussions of HOMO and LUMO energies. Br Br. N - H Meli CH HO