Slope analysis using Mosquito plugin?

I have an autocad drawing with lots of contours. I made a terrain model of it in sketchup. How do I do slope analysis for it in Grasshopper. Moreover, the mesh is triangulated.

I need to show slopes like

0-3% - yellow

3-10% - brown

and as slope increases, the brown colour darkness also increases. This is a reference image. in the attached files.

That's exactly how I want to do slope analysis.

Please provide step-by-step procedure doing the analysis using Mosquito or a Grasshopper sample file.