From the following two graphs, construct two graphs that depict the cost behavior on a total cost basis for volumes ranging from 100,000 to 150,000 square feet. (Note that the Supplies Costs Per Square Foot in these graphs are $.06 for all volumes, while Labor Costs Per Square Foot range from $.12 for 100,000 square feet to $.096 for 125,000 square feet to $.08 for 150,000 square feet.) Which of the two constructed graphs show fixed-cost behavior? Variable-cost behavior?