Development solutions for Chapter 6 are available now, i.e.,
6A Q7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
6B Q9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
6C Q7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
6D Q4, 5, 6, 7, 8, 9, 10, 11
6E Q4, 5, 6, 7, 8, 9, 10, 11
(6F Q7, 8, 9...