3 phase long line has constant A=0.8698 (angle 2.36) B=186.9(angle 75.15) both the sending end and the reci end line voltage are to be mainained at 154 kV. find the reactive vars which the compensation equipment must supply to maintain the voltage profile (a)when the line supplies load of 50 Mva at 0.85 p.f lagging (B) when the line is open circuited at the recieving end.