0.1 chapter 1 lesson 8

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    0.2 answer video chapter 1 lesson 8

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    0.3 chapter 1 lesson 9

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    0.4 answer video chapter 1 lesson 9

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    0.5 chapter 2 lesson 1

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    0.6 answer video chapter 2 lesson 1

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    0.7 part 2 answer video chapter 2 lesson 1

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    0.8 chapter 2 lesson 2

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    0.9 answer video chapter 2 lesson 2

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    0.10 chapter 2 lesson 3

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    0.11 answer video chapter 2 lesson 3

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    0.12 chapter 2 lesson 4

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    0.13 answer video chapter 2 lesson 4

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