Question: Please solve and provide steps for the following Given that Z is a standard normal random variable, P (-1.0

Please solve and provide steps for the following

  1. Given that Z is a standard normal random variable, P(-1.0<=Z<=1.5) is

2. Given that Z is a standard normal variable, the value z for which P(Z <=z) = 0.2580 is

3. Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10, P(85<=X <=90) is

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