3. Z-scores follow the standard normal distribution. (You might want to draw a picture for these. You will need your calculator.) a. What's the area under the standard normal curve between z = -2.1 and ? = 1? b. What's the area under the standard normal curve to the right of z=1.57 C. Find the 2-score that separates the bottom 65%% of the data from the top 35% of the data. O a