and are two batteries having emfs of and and internal resistances of and respectively. They are…

$E_1$ and $E_2$ are two batteries having emfs of $3\text{V}$ and $4\text{V}$ and internal resistances of $2\ \Omega$ and $1\ \Omega$ respectively. They are connected as shown in Figure 2 below. Using Kirchhoff’s Laws of electrical circuits, calculate the currents $I_1$ and $I_2$.