Texts:
A2.) A circular cylinder described by the equation y^2 + z^2 = 4 and the plane described by the equation 2x - y - z = 0 intersect to form an elliptical curve C.
2a) State a parametrization of the curve C. Be sure to include a domain for the parameter.
2b) Find a unit tangent vector v to the curve C at the point P: (x, y, z) = (0, √2, -√2).