Let O (0, 0), P(3, 4), Q (6, 0) be the vertices of the triangle OPQ. The point R inside the Δ OPQ is such that the triangle OPR, PQR, OQR are of equal area. The coordinates of R are
(a) \((\frac{4}3,3)\)
(b) \((3,\frac{2}3)\)
(c) \((3,\frac{4}3)\)
(d) \((\frac{4}3\,,\frac{2}3)\)