6. 80 points total: Given o = o = o R where a R and b R. (a) 20 points. For the special case a = 0 and b = 0, compute expressions for e!4 and A*, (b) 30 points. For @ R and b R, compute a general expression for e*4. () 30 points. For a R and b R, compute a general expression for A' Hint: The binomial expansion might be useful here. Recall that, given P R"*" and Q R"*" such that P and @ commute, (P+Q) - i) (1Pt (1) () = 7= @ where Also recall that 0! = 1