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Active Calculus - Multivariable

Activity 13.2.2.
For each curve below, find a parametrization of the curve. Ensure that each curve’s orientation matches the one specified.
(a)
The line segment in \(\R^3\) from \((0,1,-2)\) to \((3,-1,2)\text{.}\)
(b)
The line segment in \(\R^3\) from \((3,-1,2)\) to \((0,1,-2)\text{.}\)
(c)
The circle of radius \(3\) (in \(\R^2\)) centered at the origin, beginning at the point \((0,-3)\) and proceeding clockwise around the circle.
(d)
In \(\R^2\text{,}\) the portion of the parabola \(y^2 = x\) from the point \((4,2)\) to the point \((1,-1)\text{.}\)