With regard to a standard normal distribution, use Excel calculations to find the following:

a)FindP(z > 0), the proportion of the standard normal distribution above the z-score of 0.

b)FindP(z < 0.976), the percentage of the standard normal distribution below the z-score of 2.23.

c)FindP(-1.68 < z < 1.937).

d)FindP( z > 0.724).

e)Find the z-score that separates the lowest 85% of standardized scores from the top 15% . . . that is find thez-score corresponding to P85.