In Exercises 39-48, find a parametrization of the curve.
The vertical line passing through the point (3,2,0)
The line passing through (1,0,4) and (4,1,2).
The line through the origin whose projection on the xy-plane is a line of slope 3 and
whose projection on the yz-plane is a line of slope 5 (i.e., \Delta (z)/(\Delta )y=5 )
The circle of radius 1 with center (2,-1,4) in a plane parallel to the xy-plane 42 Please