(a) Forty 50 watts incandescent lamps with unity power factor

(B) Thirty-five 40 watts flouorescent lamps with a lagging power of 0.9

© One 3500 watts air conditioning system with a lagging power of 0.65

Draw the complet phasor diagram and determine

(i) the total peak current drawn

(ii) the overall power factor of the factory

actually,, i don't understand what can i do..

A case of them (a),(B), and © finds the total peak current and drawn.???

and.. power factor of the factory??

power factor = true power / apparent power

(a) power factor = 40*50 /240v

= 8.3

any body help me !!! please,,,