A transformer on a pole near a factory steps the voltage down from 3 600 V (rms)

Question:

A transformer on a pole near a factory steps the voltage down from 3 600 V (rms) to 120 V (rms). The transformer is to deliver 1 000 kW to the factory at 90% efficiency. Find
(a) The power delivered to the primary,
(b) The current in the primary, and
(c) The current in the secondary.