2. (2 Points) Give a parameterization of the described curve. As always, make sure to include a domain of param eterization: (a) The line segment from the point (11, 9, 7) to the point (5, 3, 2). (b) The portion of the graph of y = sin (22:) from the point (0,0) to the point (7r, 0). (c) The ellipse y2 + 22:2 = 1 in the plane a: = 3. (d) The right half (It 2 O) of hyperbola m2 y2 = 4 in the plane 2 = l