After years of rapid growth, illegal immigration into the United States has declined, perhaps owing to the recession and increased border enforcement by the United States (Los Angeles Times, September 1, 2010). While its share has declined, California still accounts for 21% of the nation's estimated 12.5 million undocumented immigrants. [You may find it useful to reference the z table.] a. In a sample of 40 illegal immigrants, what is the probability that more than 18% live in California