Please help me to answer A through C

Lowell & Company has the following cost data pertaining to the production of small desks: Required: Plot the preceding direct labor costs and overhead costs using the scatterplot method. Overhead costs should be on the vertical axis. Compute the fixed and variable components of the overhead costs using the high-low method. State the resulting linear cost equation. Estimated Overhead costs when Direct Labor costs are estimated to be $1, 675