Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.) USE SALT P(z 2.78) = Shade the corresponding area under the standard normal curve. 0,4 0.3 0.2 04 0.3 AA -2 0.1 2 3 -2 0.2 0.1 2 3 Z 3 2 1 0.4 0.3 0.2 0.1 2 3 3 2 0.4 0.3 0.2 0.1 2 3 Z