How to graph a Piecewise function?

Recently, I am learning to graph a piecewise function, but I am having some trouble to graph one.

For example, \(f(x)= \left \{ 4, x<-3 \right \}\left \{−x−3, −3≤x<2 \right \}\left \{ −2, x≥2 \right \}\)  

in this function, I know how to graph x<−3 and x≥2 but I always mess up on ones like −3≤x<2.

please explain how to graph one that contains a slope.