A chain survey is carried out on a plot of land represented by the traverse ABCDEFA as shown in the figure 1. The coordinates of various points computed from chain survey measurements are A(0,0), B(60,20), C(90,70), D(85,120), E(40,120) F(-20,70). All measurements are in metres. (a) Prepare the plot plan to scale and calculate its area (m?) Fig.1 B. A