3b: 3.12-3.21

3.12

3.14

3.15

3.17 

Class Examples: 3.72, 3.81, 3.83, 3.87

Hw 3b: 3.41, 3.47, 3.74, 3.82:

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3.17

Class Examples: 3.101, 3.107, 3.111, 3.124, 3.128

HW 3c: 3.106, 3.112, 3.122