A balanced Y-Y four-wire system has phase voltages Van = 120 ∠∠0°, Vbn = 120 ∠∠–120°, and Vcn = 120 ∠∠120° V. The load impedance per phase is 19 + j13 Ω, and the line impedance per phase is 1 + j2 Ω. Calculate the line currents and neutral current. Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees.

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.