Given the graphs of $f$ (in blue) and $g$ (in red) to the left answer these questions:

1. What is the value of $f$ at -5?
2. For what values of $x$ is $f(x) = g(x)$: Separate answers with commas (e.g " 5, 7").
3. Estimate the solution of the equation $g(x) = -4$.
4. On what interval is the function $f$ decreasing? Give your answer in interval notation.