The figure of speech, if I am not mistaken is personification. JFK is stating that the country can do something(implying human characteristics), but the country CAN'T literally do something for you in the way that is implied.
Answer:
1.Broken heart
2.Has a broken heart before
Use some statistics in it, or simple state what the pressures and activities are to help further your point on the last sentence. Also when saying according to the nsf teens should, further that sentence. Tell what teens should. It’s an incomplete sentence.