The graph of $f(x) = x^{2}+2x-3$ is shown above.

a) Determine the $x$-intercepts of the graph. List the value(s) of $x$ separated by a comma, or none if there are none.
$x =$

b) Find the solution(s) for: $x^{2}+2x-3 = 0$. List the value(s) of $x$ separated by a comma, or none if there are none.
Answer: