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