1. For a standard normal distribution, find the approximate value of P (z ≤ -1.25). Use the portion of the standard normal table attached to help answer the question (1st image attached.)

2. For a standard normal distribution, find the approximate value of P (z ≥ -1.25). P ( z ≥ 0.42 ). Use the portion of the standard normal table attached to help answer the question (2nd image attached.)

3. For a standard normal distribution, find the approximate value of P(-0.78 ≤ z ≤ 1.16). Use the portions of the standard normal tables attached to help answer the question (3rd and 4th images attached.)

4. The life of a manufacturer's compact fluorescent light bulbs is normal, with mean 12,000 hours and standard deviation 2,000 hours. Caitlynn wants to find the probability that a light bulb she purchased from this manufacturer will last at least 14,500 hours. What is the probability that the light bulb she purchases from this manufacturer will last greater than or equal to 14,500 hours? Use the portion of the standard normal table attached to help answer the question (5th image attached.)