Employment data at a large company reveal that 72% of the workers are married, 44% are college

Question:

Employment data at a large company reveal that 72% of the workers are married, 44% are college graduates, and half of the college grads are married. What’s the probability that a randomly chosen worker is?
a) Neither married nor a college graduate?
b) Married but not a college graduate?
c) Married or a college graduate?