2.2.1 translated
All section 2 translated and revised
3 and 3.1 translated, not revised
Section 3.2.1 Translated, not revised
All chapter 3 translated and revised
Section 4 translated, not revised
Sections 4 and 4.1 translated and revised
Section 4.2 translated and revised
Week one translated and revised
Section 7 translated, not revised
merged manually