I am drawing a 3D contour map,could you please how to draw this map?

Piezometric heads are measured simultaneously in 13 wells penetrating a confined aquifer of thickness B = 50 meters, hydraulic conductivity K = 10 m/d and porosity n = 0.27.

Each coordinate unit is U = 200 + 10x + 10y meters where x and y are two randomly generated integer numbers. The random number should be generated from a uniform distribution between 1 and 8. For example: If you randomly generate the numbers 1 & 4, the coordinate unit is U = 250 and well #1 will have the following (x, y) coordinate: (4.3U, U) = (4.3 x 250, 1 x 250) = (1075, 250). A. Use any software that you prefer to plot the head contour map. Plot 0.5 m contour lines over the appropriate area. B. Estimate the specific flux magnitude and direction at observation well #10 and at point (10U, 7U)