Compute the indicated probabilities by referring to the probability tree. 0.9 R 0.8 - M (A) P(Mns) 0.1 S 0.8 R (B) P(R) 0.2 0.2 . . . (A) P(Mns) = (Type an integer or a decimal.) (B) P(R) = (Type an integer or a decimal.)