1-Use the normal distribution of SAT critical reading scores for which the mean is 513 and the standard deviation is 108. Assume the variable x is normally distributed.

(a) What percent of the SAT verbal scores are less than 675?

(b) If 1000 SAT verbal scores are randomlyselected, about how many would you expect to be greater than 575?

2-A standardizedexam scores are normally distributed. In a recentyear, the mean test score was 21.3 and the standard deviation was 5.5. The test scores of four students selected at random are 15, 23, 8, and 35. Find thez-scores that correspond to each value and determine whether any of the values are unusual.