3. The second site plan attached below depicts a 20 x 40m block of land with a 5 x 5m grid shown in dotted lines. The grid is identified west to east...

1.20 1.48 1.73 1.88 2.21 2.52

30.25 1.02 1.18 1.32 1.54 1.81 1.98 2.64 2.53

40.52 1.10 1.26 1.45 1.65 1.94 2.15 2.65 2.86

50.99 1.22 1.38 1.50 1.80 2.01 2.22 2.38 3.00

Plot the spot levels on the site plan grid and draw the contour lines at an interval of 0.500m intervals.