Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 98.3 N98.3 N , Jill pulls with 92.7 N92.7 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 145 N145 N . (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.