π‘Pro Tip: For optimal viewing, watch Leeβs videos on a PC or Laptop rather than mobile devices.πChapter 13 - HW Help Video (Barton)πChapter 13 - HW Help Video (Owens)πChapter 13 - HW Help (Nichols, iStudy)πChapter 13 - Problem 13-4B (Burney Extra Credit)