A 452 453 454 455 453 455 456 456 454 455 457 456- B Redraw the grid above with 1:1000 scale. (X spacing=25 m, Y spacing= 15 m) Draw contour lines 454, 455 and 456 on the paper (use method of calculation whenever it is necessary). Compute the road gradient between point A and B (show calculation). Draw a longitudinal profile of line AB with horizontal scale 1:1000 and vertical scale 1:100. If A proposed road starts at A and fall down with slope 1:100 Compute the depth of cut or fill at 50 meter interval Compute the elevation of point C at the center of the grid as shown in figure