One way to gauge the toll of the AIDS epidemic in Sub-Saharan Africa is to compare life expectancies with the figures that would have been projected in the absence of AIDS. Use the broken-line graphs shown to estimate the life expectancy of a child born in the year 2012. What would the life expectancy of the same child be in the absence of AIDS? For which years of birth is the life expectancy less than 50 years? If there were no AIDS epidemic, for which years of birth would the life expectancy be less than 50 years?

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Life expectancy (years) 70 60 501 40 30 20 10 Life Expectancy in Sub-Saharan Africa Without AIDS With AIDS 1985-90 1990-95 1995-00 2000-05 2005-10 2010-15 Year of birth