Chapter 4 Videos

4.1 https://www.educreations.com/lesson/view/third-lesson-4-1/40622275/?s=dL3gR2&ref=app

4.2 https://www.educreations.com/lesson/view/third-lesson-4-2/40646529/?s=1WNhJ4&ref=app

4.3 https://www.educreations.com/lesson/view/third-lesson-4-3/40653648/?s=gdWtRD&ref=app

4.4  https://www.educreations.com/lesson/view/third-lesson-4-4/40653706/?s=8Q1W9X&ref=app

4.5 https://www.educreations.com/lesson/view/third-lesson-4-5/40665009/?s=hm2vbv&ref=app

4.6  https://www.educreations.com/lesson/view/third-lesson-4-6/40671760/?s=uO0gkG&ref=app