For the standard normal random variable z, find z for each situation.
a. The area to the left of z is 0.2119.
b. The area between - z and z is 0.9030.
c. The area between - z and z is 0.2052.
d. The area to the left of z is 0.9948.
e. The area to the right of z is 0.6915.