Transformer design

For a 50 kVA, 50 Hz, 2000/500 V transformer. If Bmax = 1.2 T, Kw= 0.25, J = 2 A/mm², Np=400 turn

1.What is the core area Ai

2.

What is the window area Aw

3.If the cross section area of the primary wires is 12.5 mm²,What is the total area of the primary conductors in the window

4.If the cross section area of the secondary wires is 50 mm²,What is the total area of the secondary conductors in thewindow?

5.What is the total area of the conductors (primary+secondary)in the window?