6. Find a set of parametric equations for the line: (a) Line passes thorugh the points (0,0) and (4,-7). (b) Line passes through the points (1,4) and (5,-2). 7. Given a parametric equations: x = t2, y-3-4Vt, find and y 8. Convert the following polar coordinates (r,0) to the rectangular coordinates (z, y): (a) For the point (r,0) = (8 ). (b) For the point (r;0) = (-2,,). (c) For the point (r,0) = (V3,