Q2. a) Discuss why a star/delta or delta/star configuration of a three-phase transformer is optimal for a wide range of installations. b) Two three-phase transformers have the following secondary equivalent circuit parameters per phase where the values have been derived from your student number using the same method as in Question 1: Transformer 1: R1 = 0.04Χ Ω Transformer 2 Χ1 = 0.12Χ Ω R₂ = 0.05Y Χ2 = 0.14Υ Ω Calculate the current delivered by each transformer if the load draws a current of 200 A at a power factor of 0.8X lagging when connected in parallel. State any assumptions which you make.