i have 6 questions that i need to do for homework and i need help its for world geography. 20 props even if you just answer one. if you answer # 3 ill give you 30. i just really need help i dont understand D':

1) what kind of information does the population pyramid give us?
2) which age group is the largest in the population pyramid?
3) Although the older generation is dying off, the ratio of males to females in the age groups above 55 reveal interesting information about Russia- at that time Russia was known as the soviet Union (USSR)- violent past.
interpet the data for these years:
world war 1:89-91 age group
Russian civil war between the supporters of the tsar nicolas the second and the bolshevic communist party:80-84 age group
liquadation of the unwanted classes by the communist party under joseph stlin:60-79 age group
world war 2: 55-59 age group
4) when does russias population begin to grow continuously again?
5)what does the population data tell us during the later years of the twentieth century tell us about the russian couples desire to limit the number of childfren they have?
6) what can we project will have to russias population over the next 50 or so years?