A carbon resistor of $\left(56\pm 5.6\right) \mathrm{k\Omega }$ is to be marked with rings of different colours for its identification. The colour code sequence will be

In the given circuit, it is observed that the current $I$ is independent of the value of resistance $R_5$. Then, the resistance value must satisfy

In the circuit shown, the heat produced in $5 \mathrm{\Omega }$ resistor is $10 \mathrm{cal} {\mathrm{s}}^{-1}$. The heat produced per sec in $4 \mathrm{\Omega }$ resistor will be