In a certain year, 89% of all Caucasians in the U. S., 77% of all African-Americans, 77% of all Hispanics, and 82% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U. S. population was 66% Caucasian, 10% African-American, and 13% Hispanic. What percentage of U. S. residents who used the Internet for e-mail were Hispanic