\textbf{180-} In the circuit shown, how many microjoules of energy is stored in the capacitor?
\textit{[Figure: Circuit with EMF source $\varepsilon = 10\,\text{V}$, internal resistance $r = 0$, resistors $R_1 = 1\,\Omega$, $R_2 = 8\,\Omega$, $R_3 = 2\,\Omega$, $R_4 = 2\,\Omega$, and capacitor $C = 5\,\mu\text{F}$]}
(1) zero \quad (2) 10 \quad (3) 40 \quad (4) 90