In the figure shown, what is the current (in Ampere) drawn from the battery? You are given :
$$
\begin{aligned}
& \mathrm{R}_1=15 \Omega, \mathrm{R}_2=10 \Omega, \mathrm{R}_3=20 \Omega, \mathrm{R}_4=5 \Omega, \\
& \mathrm{R}_5=25 \Omega, \mathrm{R}_6=30 \Omega, \mathrm{E}=15 \mathrm{~V}
\end{aligned}
$$
