A 26-year-old female is seen on the postpaum fouh day after delivering a 4.5 kg baby boy. She is concerned about her right foot, which has become numb and weak since delivering the baby. Walking has been difficult for her because her right foot tends to drop, and her toes drag. When asked about her labor course, she repos that she had an epidural with satisfactory pain relief but a difficult and prolonged pushing stage of labor (3 hours). She was put on the following bed during labor. She denies any back pain or problems with the other leg. On examination, she has decreased sensation on the top of the right foot and lateral side of the lower leg along with an inability to dorsiflex the right foot, resulting in a foot drop. Minimal peripheral edema is seen in both lower extremities. What is the most likely nerve that got compressed?