2. Suppose the discrete random X has the following probability mass function 2 2 -1 05 fx(r; 0) = or' (1 - 0)1-, xe {-1,0,1}. a) Is 71 = X sufficient for 0? Give reasons. b) Is 72 = X' sufficient for 0? Give reasons. c) Is T1 = X complete for 0? Give reasons. d) Is 72 = X2 complete for 0? Give reasons