Propose an efficient synthesis for each of the following transformations. You might find it useful to review Section 10.13 before attempting to solve these problems. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF). If there is more than one correct solution, provide just one answer. A B Br2, hv 12, hv HBr, ROOR D E F. Nal HI, ROOR 12, H20