Two balanced Y-connected loads, one drawing \(10 \mathrm{~kW}\) at 0.8 power factor lagging and the other \(15 \mathrm{~kW}\) at 0.9 power factor leading, are connected in parallel and supplied by a balanced three-phase Y-connected, \(480-\mathrm{V}\) source.

(a) Determine the source current.

(b) If the load neutrals are connected to the source neutral by a zero-ohm neutral wire through an ammeter, what will the ammeter read?