Consider a $3$ phase, $\backslash (400\backslash$mathrm$\{$~V$\},10\backslash$mathrm$\{$kVA$\},60\backslash$mathrm$\{$~Hz$\}\backslash ),$ Y$-$connected synchronous generator that has synchronous reactance of $16$ Ohm per phase and negligible armature resistance. The generator supplies rated load at rated terminal voltage with $0\mathrm{.}8$ pf lagging. Determine the torque angle $($delta$,$ in degree$)$ of the synchronous generator.