A medical researcher administers an experimental medical treatment to 200 patients. The patients in the study are categorized by blood types A, B, AB, and O. The researcher observed that the treatment had a favorable outcome for 24 of the 80 patients with blood type A, 11 of the 22 patients with blood type B, 8 of the 8 patients with blood type AB, and none of the 90 patients with blood type O. Determine the empirical probability of a favorable outcome for those patients with

a) Blood type A.

b) Blood type B.

c) Blood type AB.

d) Blood type O.