base on this article I have to respond to those question and each question answers should be separately.

https://www.npr.org/2021/03/21/979815691/new-effort-to-clean-up-space-junk-prepares-to-launch

1. What are some of the ways space junk can be removed from low Earth orbit?
2. Does space junk result in an external cost or benefit?
3. If we think about space as a good, which of the four types of goods (private goods, public goods, club goods, and common resources) is it?
4. Explain why space, and specifically low Earth orbit, is so prone to being undermaintained. What is this phenomenon called?
5. According to the article, there are several technologies that can remove existing space junk, but it will also be important to prevent the accumulation of more waste. Based on what we've learned in class, how could overuse and undermaintenance be prevented (Hint: think about how we learned to correct for externalities).