请精通美国法律的高手帮忙回答一下这题，本人看了一些资料还是不太明白怎么回答，谢谢，（请用英文回答）
1.Why did the Articles of Confederation not function well? How many articles does the Constitution include in addition to the preamble (opening statement)? What are their major concerns?
不好意思不是翻译这题目，而是回答这问题。谢谢！！
这经典的破问题随便搜下都能找到一堆文献。而且这算历史题，不算法律题吧。The Articles of Confederation did not work well in governing the new nation and a new form of government was needed.13 articles.Their major concerns are risk of anarchy and weak government.
