List all $x$-intercepts for $y = -3\sin\left(\frac{1}{2}x + \frac{\pi}{5}\right)$ on the interval $\left[ -\frac{2\pi}{5}, 4\pi \right]$ \\
$\circ \quad \frac{\pi}{5}, \frac{9\pi}{5}, \frac{18\pi}{5}$ \\
$\circ \quad -\frac{2\pi}{5}, \frac{8\pi}{5}, \frac{18\pi}{5}$ \\
$\circ \quad -\frac{2\pi}{5}, \frac{8\pi}{5}, 4\pi$ \\
$\circ \quad -\frac{2\pi}{5}, \frac{9\pi}{5}, \frac{19\pi}{5}$ \\
$\circ \quad 0, \frac{8\pi}{5}, \frac{18\pi}{5}$ \\
$\circ \quad$None of the above.