4.1.1 notes
4.1.2 notes 4.1.2 video example 4-28
4.1.3 notes 4.1.3 video example 4-43
4.2.1 notes 4.2.1 video example 4-57 4-61 4-62
4.2.2 notes 4.2.2 example video 4-76
4.2.3 notes 4.2.3 video example
4.3.1 notes 4.3.1 video example 4-109
4.3.2 notes 4-119