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Question: Color of the contour lines

Question:Color of the contour lines

myphi 45 Maple
contourplot plotting colorscheme color
June 10 2019
1

I have a 3D plot as follows:

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with(plots);

plot3d(sin(x*y), x = -2 .. 2, y = -2 .. 2, axes = framed, colorscheme = ["zgradient", ["Blue", "Green", "Yellow", "Red"]]);

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I want to plot its 2d contour (i.e. graph x-y plane).

How do I plot the contour of the graph in which the color of the contour lines have the corresponding colorscheme as the 3d plot?  Thank you. 

(P.S. This question has been updated)

 
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