A single-phase step-down transformer is rated \(13 \mathrm{MVA}, 66 \mathrm{kV} / 11.5 \mathrm{kV}\). With the \(11.5 \mathrm{kV}\) winding short-circuited, rated current flows when the voltage applied to the primary is \(5.5 \mathrm{kV}\). The power input is read as \(100 \mathrm{~kW}\). Determine \(\mathrm{R}_{\mathrm{eq} 1}\) and \(\mathrm{X}_{\mathrm{eq} 1}\) in ohms referred to the high-voltage winding.