Answer
(a) $(\pm2,0),(0,\pm2)$,
(b) the x-axis, the y-axis, and the origin.
Work Step by Step
(a) Based on the given figure, we can find the intercepts as $(\pm2,0),(0,\pm2)$,
(b) We can identify that the graph is symmetric with respect to the x-axis, the y-axis, and the origin.