Use the graph below to answer the question that follows:
cosine graph with points at 0, 3 and pi, negative 5 and 2 pi, 3
What are the amplitude, period, and midline of the function?
Amplitude: 4; period: 2π; midline: y = −1
Amplitude: 8; period: 2π; midline: y = 1
Amplitude: 8; period: π; midline: y = −1
Amplitude: 4; period: π; midline: y = 1

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