Number three only, I got the rest. Thanks

Estimating Cost Behavior using scattergraph, High-Low Method, and Least-Squares Regression Odessa, Inc., manufactures one model of computer desk. The following data are available regarding units shipped and total shipping costs: Required: 1. Prepare a scattergraph of Odessa's shipping cost and draw the line you believe best fits the data. 2. Based on this graph, estimate Odessa's total fixed shipping costs per month. 3. Using the high-low method, calculate Odessa's total fixed shipping costs and variable shipping cost per unit