I1=0.5A;I3=0A;I2=0.25A;I4=0.025AI1=0.05A;I2=0.02A;I3=0;I4=0.025AI1=0.05A;I2=0.025A;I3=0;I4=0.025AI1=0.5A;I2=0.025A;I3=0;I4=0.25A