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Graph 8.1 Data plotted in the graph appear in the table below. Demand 140 120 100 80 60 40 20 0 1) Refer to Graph 8.1. What is the average demand for the second period? A) 63.57 B) 50.71 C) 82.5 D) 93.5 2) Refer to Graph 8.1. What is the seasonal index for the first Saturday in the data set? A) 1.69 B) 1.56 C) 0.64 D) 0.58 3) Refer to Graph 8.1. What is the average seasonal index for the Sundays in the data set? A) 0.65 B) 0.67 C) 149 D) 1.54