In which quadrant or on which axis do each of the points (x,4), (3,y), (x,0), (1,2) and (z,w) lie?

Point (1,2) lies in the 1st quadrant. Point (x,4) lies in the 2nd quadrant. Point (z,w) lies in the 3rd quadrant. Point (3,y) lies in the 4th quadrant. Point (x,0) lies on the negative side of x-axis.