A point charge is at the origin. With this point charge as the source point, what is

Question:

A point charge is at the origin. With this point charge as the source point, what is the uo it vector r in the direction of
(a) The field point at x = 0, y = -1.35 m;
(b) The field point at x = 12.0 cm, y = 12.0 cm;
(c) The field point at x = -1.10 m, y = 2.60 m? Express your results in terms of the unit vectors i and j.