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Q3. A three phase, 4 wire. Unbalanced load draws the following currents with reference to :

I_RN=5 A ∠ 0^o
I_YN=8 A ∠-150^o
I_BN=3 A ∠85^o

Calculate EACH of the following:

(a) The current in the neutral line; (7)

(b) The angular position of the neutral current with reference to ; (2)

(c) The total power dissipated by the load if it is connected to a 415 V supply. (7)