A 9 kVA, 208 V (L-L), 3-phase Y connected stator, synchronous generator has a stator resistance of 0.1 ohm per phase, and a synchronous resistance of 5.6 ohm per phase. The generator is driven by a diesel engine, and is delivering rated kVA at rated voltage. Determine the voltage regulation when the power factor of the load is
(a) 0.8 lagging