Required. 1. What is the actual (curvilinear) and estimated (semi variable) cost shown by the graph the following activity levels? a. 20.000 miles b. 40.000 miles c. 60.000 miles d. 90,000 miles 2. How good an approximation does the semi variable-cost pattern provide if the department's relevant range is 40,000 to 60,000 miles per month? What if the relevant range is 20,000 to 90,000 miles per month