Solutions:
https://new.gregmat.com/course/powerprep-walkthroughs
https://greprepclub.com/forum/h-is-the-midpoint-of-ig-3381.html
https://gmatclub.com/forum/in-the-figure-above-is-ij-5-1-h-is-the-midpoint-of-ig-and-j-is-266564.html
P.S. - Please add a Spoiler tag when discussing PowerPrep questions.