A standardizedexam's scores are normally distributed. In a recentyear, the mean test score was 20.8 and the standard deviation was 5.7. The test scores of four students selected at random are 14, 23, 9, and 35. Find thez-scores that correspond to each value and determine whether any of the values are unusual.

Thez-score for 14 is

nothing

.

(Round to two decimal places asneeded.)