A 200 kVA rated single phase transformer has a full-load copper loss of 1.5 kW and an iron loss of 1 kW. At half-load, the iron loss and copper loss will be ________ and ________ respectively.
1
1000 W and 375 W
2
250 W and 1500 W
3
500 W and 750 W
4
1500 W and 250 W