120@120 IbB 120@ XXXXXXXXXX@0° IaA 爼 a) State if this is a positive sequence (abc) or negative sequence (acb) b) Given that Z 100-j752, compute the phase currents IAB, IBc and Ica c) Compute the line...

120@120 IbB 120@-1200 120@0° IaA 爼 a) State if this is a positive sequence (abc) or negative sequence (acb) b) Given that Z 100-j752, compute the phase currents IAB, IBc and Ica c) Compute the line currents laA, IbB, and Iec. d) A class mate of yours asked why there is a need to use three phase transmission. The answer given was to prevent having a system with a single point of failure. Assume that the source between nodes a and c fails (i) will the line voltage cC remain at 120V? (ii) How would the line currents be affected?