I just need help finding the p- value. thanks!

(20 points) An article published in the Washington Post claims that 45 percent of all Americans have brown eyes. A random sample of n = 84 college students students found 31 who had brown eyes. Consider testing Ho : P = .45 Ha : p #.45 (a) The test statistic is z = (b) P-value = Note: You can earn partial credit on this