Explain the given problem

Problem 1- Suppose that you invented a product that you know will make millions, only to find out that someone else has already gotten a patent for it, thus preventing you from making it.

Part 1- Would this be fair? Why or why not?

Then, suppose that the tables were turned and someone else invented a product that you already had a patent for purely by accident.

Part 2- Would this change your mind about the fairness of the situation? Why or why not?

Problem 2- Imagine that you came across a plot of land and grew a successful farm on it, only to find out that the land already belonged to someone else.

Part 1- Who would have the right to the crops, and why?

Problem 3- Which system of software development does you think will create a more robust environment for the development and distribution of software: PS or FOSS? Why?

I need help to create a more robust environment for the development of software.