Graph showing the positive x-axis, the y-axis and the four points (0,1), C(1,0), B(2,-1), and A(0,-1). The line from (0,1) to B and AB are both drawn. The trapezium ABCO is shaded.

\(O\) is the origin and \(A\), \(B\) and \(C\) are the points \((0,-1)\), \((2,-1)\) and \((1,0)\) respectively. Write down the four inequalities which define the shaded region \(ABCO\) including its boundary.