Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 10. Use the empirical rule to determine the following
(a) What percentage of people have an IQ score between 80 and 1207
(b) What percentage of people have an IQ score less than 80 or greater than 1207
(c) What percentage of people have an IQ score greater than 130?