Employ the table of standard normal probabilities (z table) to answer the following questions.
What is P(z > 0.5)?
What is P(-0.8 < z < 1.5)?
What is P(z < -1.2)?
What z-value leaves 95 % of the normal distribution to its right?
What z-value, and its negative, leaves 20 % of the normal distribution in each tail, for a total tail area of 40%?