2. (15') The following five resistors are connected to a power supply of 2 V, where $R_1 = 2\Omega$, $R_2 = 5\Omega$, $R_3 = 6\Omega$, $R_4 = 10\Omega$, and $R_5 = 24\Omega$. Find (a, 2') $R_{eq}$, (b, 3') $I_1$, (c, 5') $V_4$, and (d, 5') $I_2$.
$\mathcal{E}$
$R_2$
$R_3$
$R_1$
$R_4$
$R_5$