In each situation below, calculate the standardized score (or z-score) for the value x:
a. Mean μ = 0, standard deviation σ = 1, value x = 1.5.
b. Mean μ = 10, standard deviation σ = 6, value x = 4.
c. Mean μ = 10, standard deviation σ = 5, value x = 0.
d. Mean μ = 210, standard deviation σ = 15, value x = 225.