Let Z be a standard normal random variable and calculate the following probabilities, drawing pictures wherever appropriate. (Round your answers to four decimal places.) USE SALT (a) P(0 ≤ Z≤ 2.21) 0.4865 ✓ (b) P(0 ≤ Z≤ 2) 0.4773 (c) P(-2.90 ≤ Z ≤ 0) 0.4981

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