Given that z is a standard normal random variable, find z for each situation (to 2 decimals). a. The area to the left of z is 0.9713. 1.9 b. The area between 0 and z is 0.4713 (z is positive). 1.9 C. The area to the left of z is 0.8729. d. The area to the right of z is 0.1230. e. The area to the left of z is 0.6736. f. The area to the right of z is 0.3264