Two balanced Y-connected loads in parallel, one drawing 15 kW at 0.6 power factor lagging and the other drawing 10 kVA at 0.8 power factor leading, are supplied by a balanced, three-phase, 480-volt source.

(a) Draw the power triangle for each load and for the combined load.
(b) Determine the power factor of the combined load and state whether lagging or leading.