The following table provides statistics found in the document Science and Engineering Indicators, issued by the National Science Foundation, for a sample of 1564 adults. The first two columns of the table present an educational level distribution for the adults; the third column gives the percentage of the adults in each educational-level category who read an astrology report every day.

For one of these adults selected at random, determine the probability that he or she
a. Reads an astrology report every day.
b. Is not a high school graduate, given that he or she reads an astrology report every day.
c. Holds a baccalaureate degree or higher, given that he or she reads an astrology report every day.

Percentage Percentage of adults astrology Educational level Less than high school High school graduate Baccalaureate or higher 7.4 53.3 39.3 9.0 7.0 4.0