11. compound a (c, h12) upon treatment of bhs followed by h202 in naoh gives primary alcohol compound b (c, hi40). compound a can also give compound c (c, hisbr) if treated with hbr. compound c gives compound d (c-h12) when treated with tert-butyl oxide in heat. finally, if compound d is reacted with kmnos in acid, it produces the keto-acid drawn below. show all the structures for compounds a, b, c and d. (20)