I need help on these 6 math problems:

Find other polar coordinates (r, 0) of the point (3, ) satisfying the given conditions. (Express numbers in exact form. Use symbolic notation and fractions where needed. Give your answers as point coordinates in the form (*, *).) (a) r > 0. - 2n 0, 2x 5 0 0, - 2x 0, 2x