For some problems, if possible, sketch a little diagram to clearly see the area under the normal curve.

7. Find the z value to the right of the mean so that

a. 64.74% of the area under the normal distribution curve lies to the left of it.

b. 83.40% of the area under the normal distribution curve lies to the left of it.

c.93.16% of the area under the normal distribution curve lies to the left of it.