Not to be rude, but Everyone here these days are just plain old rude, don't you think?

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )

Yes. there is a constant ratio of number of calories to gram of protein.12/3=24/4=32/8=44/11=4