figure() u=-0.1:0.005:0.1; v=-0.1:0.005:0.1; [x,y]=meshgrid(u,v); z=sin(x-y)./abs(x)+abs(y); surf(x,y,z); hold on % contourf(x,y,z) % ezplot('x+y=3') % ]) %axis equal clc clear u=-:; v=-:; [x,y]=meshgrid(u,v); z=.*x.^ +.*y.^; surf(x,y,z); hold on t=:…