Consider the following vector-valued function: y : (−π,0) × (−1,1) → R³, y(u, v) = {cosh (v) cos(u), v, cosh (v) sin(u)}. Sketch the values of y obtained by holding v = Vo constant and varying u, where (i) Vo = ±½¼, (ii) vo = ±½, and (iii) vo = ±³ (you should draw six curves). Sketch the values of y obtained by holding u = uo constant and varying v, −7, and (iii) u。 =— 4 37T U₁ = 7, (ii) u = − == Sketch the full image of y. where (i)

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