5kVA, 200/400V,single-phase transformer has the equivalent resistance and reactance referred to low voltage side of 1.2 and 3.5 respectively. Evaluate The equivalent resistance and reactance

5kVA, 200/400V,single-phase transformer has the equivalent resistance and reactance referred to low voltage side of 1.2Ω and 3.5Ω respectively. Evaluate

The equivalent resistance and reactance referred to the high voltage side.

1. the resistance and reactance of the low voltage side winding, if the resistance and

reactance of the high voltage side winding are 3Ω and 10Ω respectively, and

3. the copper loss of the transformer at full load.