In Exercises 18–20, determine whether or not the IVT applies to show that the given function takes on all values between ƒ(a) and ƒ(b) for x ∈ (a, b). If it does not apply, determine any values between ƒ(a) and ƒ(b) that the function does not take on for x ∈ (a, b).

for the interval [−2, 2].

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-x² f(x) = 1 X for x < 0 for x = 0 for x > 0