HELP!!!! Difficult World Language ignment? Easy 10 points.?

Answer all!!! 1) Do linguists know when language began? 2) Do linguists know how people began to speak? 3) Fill in the blank........Almost 1/2 of the world's population speaks a language that belongs to this language family. 4) This forms the backbone of English 5) This language may possibly become the common language for all of Africa's black population. 6) The tongues of this group are more like each other than languages of most of the other other Indo-European sub-groups. 7) This is the modern language closest to the original Indo-European language. 8)This family of languages include Finnish, Estonian, Hungarian, Turkish, and Mongol. 9) This is the important date for the English language, when the Norman's invaded England and established French as the official language. 10) Because of the Norman invasion, not only many French and Latin words came into English, but what else has changed? 11) How many ethnic languages subdivide the major African divisions?