If `P(-5, -3), Q(-4, -6), R(2, -3)` and `S(1, 2)` are the vertices of a quadrilateral `P Q R S` , find its area.
If `P(-5, -3), Q(-4, -6), R(2, -3)` and `S(1, 2)` are the vertices of a quadrilateral `P Q R S` , find its area.
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