Select the correct answer with respect to the given network:
1
\(\rm - {I_1}{R_1} - {I_2}{R_2} - {I_3}{R_3} - {I_4}{R_4} + {E_2} + {E_1} = 0\)
2
\(\rm - {I_1}{R_1} - {I_2}{R_2} - {I_3}{R_3} - {I_4}{R_4} - {E_2} - {E_1} = 0\)
3
\(\rm - {I_1}{R_1} - {I_2}{R_2} + {I_3}{R_3} - {I_4}{R_4} - {E_2} + {E_1} = 0\)
4
\(\rm - {I_1}{R_1} - {I_2}{R_2} - {I_3}{R_3} - {I_4}{R_4} = {E_2} + {E_1}\)
5
None of these