Use z-scores to answer the following using the Excel worksheet:

1)Pat scored 75 on a stats test that had a mean of 81 and a standard deviation of 4 while Chris scored 79 on a stats test that had a mean of 82 and a standard deviation of 1.5.Convert each student's test score to a z score, and then determine who scored better relative to the rest of his or her class.

Can you please help with this. I don't know how to input this or what functions im suppose to use Thank You