Letg : R2 > lee given by 9(3! 9') = 64.24.34; 3) Explain in words the difference between a contour and a cross section. in) Find the contours of g for heights 1. e, and ea. ( ( [0) Sketch the contours from (b) on a single labelled diagram. (d) Without finding V9, mark the direction of V9 at three points on the e contour you drew in part {c}. l e) Without nding V9, mark the direction in which the directional derivative is 0 at three points on the 82 contour you drew in part (c)