Question: system of inequation solve

Hi,

I would like to plot the region of solution of the following system defined by some equations.

restart; with(Optimization);
with(plots);

inequal({-5 <= 4*y1+2*y2+3*y3, -2 <= 3*y1+5*y2+2*y3, -1 <= y1+2*y2+y3, 0 <= y2, y1 <= 0}, {y1, y2, y3}, color = "Nautical 1");

Many thanks for any help

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