The total length of the see-saw is 8m. Stefani is at the very end of the see-saw with a weight of 360 N. The second child (Stefan) has a weight of 790 N. Their little brother, Julian, joins Stefani on her side. Julian has a weight of 150 N and is sitting 1.4 m from the center. Now where should Stefan sit in order to balance out Stefani and Julian?