Draw contours for the following data using the grid method. The following data of a piece of land showing spot heights at regular grid intervals was recorded. A1, A2 …… A5 – 843.92, 847.60, 848.44, 847.60, & 849.20 B1, B2 …… B5 – 848.03, 852.01, 854.33, 855.64, & 854.63 C1, C2 …… C5 – 848.51, 854.32, 856.72, 858.03, & 859.34 D1, D2 …… D5 – 849.44, 853.23, 854.51, 855.24, & 862.21 E1, E2 …… E5 – 842.23, 839.30, 838.32, 849.51, & 862.83   Construct a grid of your own meaningful size and draw contours for the following sizes.         i.            852       ii.             858 III 848