From the following two graphs, construct two graphs that depict the cost behavior on a per-square-foot basis for volumes ranging from 100,000 to 200,000 square feet. (Note that the Total Labor Cost in these graphs is $24,000 for all volumes, while Total Supplies Cost ranges from $5,000 for 100,000 square feet to $10,000 for 200,000 square feet.) Which of the two constructed graphs show fixed-cost behavior? Variable-cost behavior?