Halliday, Resnick & Walker — Circuits: Problem 51

51 In Fig. 27-49, $R_1 = 6.00 \Omega$, $R_2 = 24.0 \Omega$, and the ideal battery has emf $\mathcal{E} = 12.0 V$. What are the (a) size and (b) direction (left or right) of current $i_1$? (c) How much energy is dissipated by all four resistors in 1.00 min?