13. A blood bank catalogs the types of blood, including positive or negative Rh-factor, given by donors during the last five days. The number of donors who gave each blood type is listed below. Suppose a donor is selected at random from this group of 409 donors. Blood Type AB Total A B 344 Ph-Positive 156 139 37 12 Ph-Negative 28 25 g 4 65 Total 184 164 45 16 409 (a) Find the probability that the donor has blood type O or type A blood. (5pts) type B blood. (5pts) (b) Given that the selected donor has negative Rh-factor, find the probability that the donor has