[填空题]
Let $ f(x)=24-2 x^{2}$ , for x $\in \mathbb{R}$ . The following diagram shows part of the graph of f and the rectangle OPQR , where R is on the positive x -axis, P is on the y -axis and Q is on the graph of f .
Find the coordinates of point R(x,y) that gives the maximum area of OPQR.x = y =
