10.1 problem 1913
  10.2 problem 1914
  10.3 problem 1915
  10.4 problem 1916
  10.5 problem 1917
  10.6 problem 1918
  10.7 problem 1919
  10.8 problem 1920
  10.9 problem 1921
  10.10 problem 1922
  10.11 problem 1923
  10.12 problem 1924
  10.13 problem 1925
  10.14 problem 1926
  10.15 problem 1927
  10.16 problem 1928
  10.17 problem 1929
  10.18 problem 1930
  10.19 problem 1931
  10.20 problem 1932
  10.21 problem 1933
  10.22 problem 1934
  10.23 problem 1935
  10.24 problem 1936
  10.25 problem 1937
  10.26 problem 1938
  10.27 problem 1939