Consider the following statements regarding AC Machine Windings:1.Distributed windings are used in AC machines to reduce harmonic content and produce a nearly sinusoidal EMF waveform.2.The pitch factor accounts for the effect of short-pitching of coils and usually reduces the magnitude of induced EMF.3.Concentrated windings inherently produce a perfectly sinusoidal induced EMF waveform.4.The winding factor is defined as the product of pitch factor and distribution factor in AC machines.Which of the above statements is/are correct?