You are a member of explorers in Antarctica who found a human civilization that has the following population profile (pictured). As a demographer among the explorers, you learned that the total fertility rate for this newly discovered group of people is precisely equal to the replacement-level fertility rate. You also learned that the mortality rate has not changed for the last few decades. With the given information, 1) what is the most important future population problem for this civilization? Explain. 2) Then provide two recommendations to help this civilization to prevent the problern