A lossless transmission line with $0.2$ $\text{pu}$ reactance per phase uniformly distributed along the length of the line, connecting a generator bus to a load bus, is protected up to $80 \%$ of its length by a distance relay placed at the generator bus. The generator terminal voltage is $1$ $\text{pu}$. There is no generation at the load bus. The threshold $\text{pu}$ current for operation of the distance relay for a solid three phase-to-ground fault on the transmission line is closest to:
- $1.00$
- $3.61$
- $5.00$
- $6.25$