แสดงชื่อครูประจำวิชาคณิตศาสตร์
Show the name of the teacher for the math course.
df_teacher = pd.DataFrame(columns=['Name', 'Teacher_ID'])
df_course_arrange = pd.DataFrame(columns=['Course_ID', 'Teacher_ID'])
df_course = pd.DataFrame(columns=['Course', 'Course_ID'])
pd.merge(pd.merge(df_course_arrange[df_course_arrange['Course'] == 'Math'], df_course, on='Course_ID'), df_teacher, on='Teacher_ID')['Name']