Suppose that the population of all gasoline mileages is normally distributed with mean µ = 31.5 mpg and standard deviation σ = 0.8 mpg. Let y denote a mileage randomly selected from this population. Find the probabilities:
- P(30.7 ≤ y ≤ 32.3)
- P(31.0 ≤ y ≤ 31.3)
- P(y ≤29.5)
- P(y ≥ 33.4)