A 60-Hz, single-phase two-wire overhead line has solid cylindrical copper conductors with a \(1.5 \mathrm{~cm}\) diameter. The conductors are arranged in a horizontal configuration with \(0.5 \mathrm{~m}\) spacing. Calculate in \(\mathrm{mH} / \mathrm{km}\)

(a) the inductance of each conductor due to internal flux linkages only,

(b) the inductance of each conductor due to both internal and external flux linkages, and

(c) the total inductance of the line.