Which of the following statements are true about the function below? Select all that apply.
f(x) = (x - 4)2-1
the minimum value of f(x) is -1
the maximum value of f(x) is 15
f(x) has a maximum at x = 4
f(x) has a zero at x = 3
f(x) has a minimum at x = -1
f(x) has a zero at x = 4