Answer
(a)
$x$-intercepts: $0$ and $4$
$y$-intercept: $0$
(b)
relative minimum: $(3, -3)$
Work Step by Step
(a)
The $x$-intercepts can be found by looking at the points where the graph touches/crosses the $x$-axis.
The graph shows that the $x$-intercepts are at $(0, 0)$ and $(4, 0)$.
Thus, the $x$-intercepts are: $0$ and $4$.
The graph crosses the $y$-axis at $(0, 0)$.
Thus, the $y$-intercept is $0$.
(b)
The graph has a relative minimum at $(3, -3)$