A three-winding transformer is connected to an AC voltage source as shown in the figure. The number of turns are as follows : N₁ = 100, N₂ = 50. If the magnetizing current is neglected, and the currents in two windings are I₂ = 2 ∠30° A and I ₃ = 2 ∠150° A, then what is the value of the current I₁ in Ampere?