2.1 1-4
2.2 1-6,8,9
2.3 1-6, try 7-11
2.4 1-3
2.5 1
2.6 1-4
2.7 not covered




1.1 1-10
1.2 1-11 and 13
1.3 1-10
1.4 1-11
1.5 1-8
1.6 1-7
1.7 1-7