Given: P(A)=0.25, P(B)=0.50, P(AB)=0.12, P(ABc) = 0.13, P(AcB)=0.38, P(AcBc)=0.37. Express the following events in set notation and find their probablities.
(a) B occurs and A does not occur
(b) Neith A nor B occurs
(c) Either A occurs or B does not occur