A transformer has a percentage resistance of 2% and percentage reactance of 4%. What are its regulations at power factor 0.8 lagging and 0.8 leading , respectively?

1. 4% and -0.8%
2. 3.2% and -1.6%
3. 1.6% and -3.2%
4. 4.8% and -0.6 %

Answer :  4% and -0.8%