Figure 2 below shows two batteries and having emfs of and and internal resistances of and…

Figure 2 below shows two batteries $E_1$ and $E_2$ having emfs of $18\text{ V}$ and $10\text{ V}$ and internal resistances of $1\,\Omega$ and $2\,\Omega$ respectively. $W_1$, $W_2$ and $W_3$ are uniform metallic wires AC, FD and BE having resistance of $8\,\Omega$, $6\,\Omega$ and $10\,\Omega$ respectively. B and E are midpoints of the wires $W_1$ and $W_2$. Using Kirchhoff’s laws of electrical circuits, calculate the current flowing in the wire $W_3$.