In the circuit shown below, the magnitude of the voltage V₁ in volts, across the 8 k$$\Omega$$ resistor is ________. (round off to nearest integer).

An air-core radio-frequency transformer as shown has a primary winding and a secondary winding. The mutual inductance $M$ between the windings of the transformer is $\_\_\_\_$ $\mu \mathrm{H}$. (Round off to 2 decimal places)

In the given circuit, the parameter k is positive, and the power dissipated in the 2 Ω resistor is 12.5 W. The value of k is ________.

The current i (in Ampere) in the 2 Ω resistor of the given network is _________.