A thick metal shell has an inner radius of $6.0\ \text{cm}$ and an outer radius of $9.0\ \text{cm}$, and carries a total charge of $+3.0\ \text{nC}$. A point charge of $-2.0\ \text{nC}$ is held inside the hollow, $3.0\ \text{cm}$ from the centre, without touching the shell, as in the figure. It is held there by a thin insulating support that carries no charge. Distances outside the shell are measured from its centre. Everything has settled, and nothing else is nearby. Take $\dfrac{1}{4\pi\varepsilon_0} = 9.0 \times 10^{9}\ \text{N m}^2\,\text{C}^{-2}$. Which of the following statements are correct?

Fig. 1: A cross-section of a thick metal shell with inner radius 6.0 cm and outer radius 9.0 cm, carrying a total charge of plus 3.0 nanocoulombs. A point charge of minus 2.0 nanocoulombs sits in the hollow, 3.0 cm from the centre.