Repeat the defining interval without losing endpoints

It is given that $f(x)=\begin{cases}3+x&0<x\le2,\\7-x&2<x\le4,\end{cases}$ and $f(x)=f(x+4)$ for all real $x$. (i) Find $f(1)$, $f(8)$ and $f(29)$. (ii) Sketch $y=f(x)$ for $-3<x\le8$.