Suppose z = 16-4x² - y². (i) Write down at least three possible values for (x,y). (ii) Determine the domain and range. (iii) Sketch the domain.

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(b) Suppose z = 16-4x² - y². (i) Write down at least three possible values for (x,y). (ii) Determine the domain and range. (iii) Sketch the domain. Pro

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