The length of a line segment joining $\mathrm{A}(2,-3)$ and $\mathrm{B}$ is $10$ units. If the abscissa of $\mathrm{B}$ is $10$ units, then its ordinates can be

If the line segment joining the points $(3,-4)$ and $(1,2)$ is trisected at points $P(a,-2)$ and $Q\left(\frac{5}{3},b\right)$, then

If the coordinates of one end of a diameter of a circle are $(2,3)$ and the coordinates of its centre are $(-2,5)$, then the coordinates of the other end of the diameter are