3. The pressure (units: pascal, Pa) within a rectangular chamber is given by P(x, y, z)...

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3. The pressure (units: pascal, Pa) within a rectangular chamber is given by P(x, y, z) = /36x +9y + 4z 72x + 18y + 45. -10 10 -10 -10 0 -5 5 0 10 10 (i) Write the equation of the contours in standard form and describe the surface. (ii) Parametrically define the general contour surface. Two parameters, say u and v, are required to parametrise a surface. 3. The pressure (units: pascal, Pa) within a rectangular chamber is given by P(x, y, z) = /36x +9y + 4z 72x + 18y + 45. -10 10 -10 -10 0 -5 5 0 10 10 (i) Write the equation of the contours in standard form and describe the surface. (ii) Parametrically define the general contour surface. Two parameters, say u and v, are required to parametrise a surface.