<image>Mr. Wang drove a sedan from point \(A\) to point \(B\). After passing a service area where he rested for a while, he continued at the original speed until he reached point \(B\). After another rest at point \(B\), he started his return to point \(A\) via the same route, but at a speed which is \(1.2\) times the original speed. The graph depicting the distance \(y (km)\) from point \(A\) as a function of time \(x (h)\) is shown below.

\((1)\) Mr. Wang rested for ______ \(h\) during his journey from point \(A\) to point \(B\);
\((2)\) Find the functional relationship between \(y\) and \(x\) for Mr. Wang's return journey from point \(B\) to point \(A\) (it is not required to state the domain of the variable \(x\));
\((3)\) When Mr. Wang returns from point \(B\) to point \(A\), he passes the service area where he previously rested en route to \(B\). Find the value of \(x\) at this point in time.