Solve the following Linear Programming Problems graphically: Maximise \( \mathrm{Z}=3 x+4 y \) \...

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Solve the following Linear Programming Problems graphically:
Maximise \( \mathrm{Z}=3 x+4 y \)
\( \mathrm{P} \) subject to the constraints : \( x+y \leq 4, x \geq 0, y \geq 0 \).

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