Hello, I'm looking for some help reading a piecewise graph, so if you can teach me how to read that graph it would be appreciated!

Imageshack - sdc17057.jpg

Also I tried doing some and would like you guys to double check if possible.

The value of t where h(t)=4 I got t=3

Find h(3). I got 4

Also I'm having trouble stating the domain/range and when it says state the intervals where h(t) is.

Thanks for your help!