The coordinates of the point which is equidistant from the vertices of the triangle formed by the points O(0, 0) A(a, 0) and B(0, b) are ____________ .
The ratio in which the point $P\left(\frac{3}{4}, \frac{5}{12}\right)$ divides the line segment joining the points $A(1/2, 3/2)$ and B(2, - 5) is ____________ .