Find the Z-Score Corresponding to the Given Value and Use

Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual.
Consider a score to be unusual if its z-score is less than -2.00 or greater than 2.00. Round the z-score to the nearest tenth
if necessary.
-A time for the 100 meter sprint of 20.0 seconds at a school where the mean time for the 100 meter sprint is 17.7 seconds and the standard deviation is 2.1 seconds.

A) 2.3; unusual
B) 1.1; not unusual
C) 1.1; unusual
D) -1.1; not unusual