Case(a)
Total load on station1=20+j5.635 pu
Power factor of station1=0.963 pu lagging
Total load on station2=20+j15.635 pu
Power factor of station2=0.788 pu lagging

Case(b)
Total load on station1=20+j5.132 pu
Power factor of station1=0.969 pu lagging
Total load on station2=20+j16.119 pu
Power factor of station2=0.781 pu lagging