6. Evaluate dA, where R is the parallelogram enclosed by the lines x - 2y = 0, x-2y=4,3x-y=1 and 3x -y = 8.
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dA, where R is the parallelogram enclosed by the lines x - 2y = 0, x-2y=4,3x-y=1 and 3x -y = 8.