From the list of convolutions below, select the statement that is incorrect. O (a) The sum of 2 i.i.d. Bern(p) RVs has a Bin(2, p) distribution. (b) The sum of 5 i.i.d. Exp(3) RVs has an Erlang distribution with mean 5/3. (c) The sum of 5 i.i.d. Pois(3) RVs has an Erlang distribution with mean 15. O (d) If Z1 and Z2 are i.i.d. Nor(0,1), then Z? + Z? ~ x2(2). (e) The sum of 100 i.i.d. Gamma(1, 1) RVs is approximately normal