Step $1$: from P$1$ ping P$3(192\mathrm{.}168\mathrm{.}125\mathrm{.}10)$

Step $2$: from P$1$ trace the route to P$3(192\mathrm{.}168\mathrm{.}125\mathrm{.}10)$; use the tracert command.

Step $3$: from P$2$ ping P$4(2002$:C$0$:$125$::$2)$

Step $4$: from P$2$ trace the route to P$4(2002$:C$0$:$125$::$2)$; use the tracert command. Note: the ping should be successful

By using packet tracer