Bayes theorem

1.Suppose that it snows in Greenland an average of once every 27 days, and when it does, glaciers have a 21% chance of growing. When it does not snow in Greenland, glaciers have only a 6% chance of growing. What is the probability that it is snowing in Greenland when glaciers are growing? Enter the answer as a decimal, such as 0.123.

2. In a certain year, 58% of all Caucasians in the U.S., 52% of all African-Americans, 55% of all Hispanics, and 58% of residents not classified into one of these groups used the Internet to search for information. At that time, the U.S. population was 65% Caucasian, 13% African-American, and 15% Hispanic. What percentage of U.S. residents who used the Internet for information search were African- American? Enter the answer as a percent (Ex: 10%)