https://webwork.math.lsu.edu/webwork...1084c3a481.png

https://webwork.math.lsu.edu/webwork...beb9a70691.png

https://webwork.math.lsu.edu/webwork...99ddc27371.png What is the vector https://webwork.math.lsu.edu/webwork...92bdd1a1a1.png whose tail and head are the midpoint of https://webwork.math.lsu.edu/webwork...89f6775d81.png and the midpoint of https://webwork.math.lsu.edu/webwork...55678d3681.png, respectively.

Please help!