3. The equation of line M is 3x - 8y + 20 = 0, i) Find the coordinates of the point 'P which is equidistance from *-axis and y - axis.  ii) O is the point on origin, find the equation of straight line OP.  4. The Coordinates of P are (3, 8) and the coordinates of Q are (9,-2). Find the equation of perpendicular bisector of PQ.