5. The following matrix is the result of the Gauss-Jordan elimination process on a system of linear equations. Give the solution, if it exists. (2 marks) 1 0 2 8 0 1 0 1 0 0 C 66. Sketch a graph to solve the following system of inequalities. Clearly label the intercepts of the boundary lines and the corners of the feasible region. ( 4 marks) 2x + 3y 1 y 20 7. Maximize Z = 5x + 3y subject to: (5 marks) ax + 2y 4 r, y20 Clearly state the maximum value of Z subject to these constraints and the coordinates (X, y) at which it occurs