1. Find the probability that a standard normal random variable (z) is less than or equal to 1.37. 2. Find the probability that a standard normal random variable (z) is greater than or equal to -1.06. 3. Find the probability that a standard normal random variable (z) is between -1.25 and 1.89. 4. Find the probability that a standard normal random variable (z) is less than or equal to -1.21 or greater than or equal to 2.32. 5. Find the probability that a standard normal random variable (z) is greater than or equal to 3.97. 6. Find the z-score such that the area to the left of z is 0.35.