I'm struggling to get started with these discussions. Can you please help me?

1.Give me a normative argument: if I create something new, shouldn't I get to make monster profits on it?Isn't Zuckerberg a monopolist of Facebook, like Jeff Bezos is trying to monopolize online retail?Is that wrong?What do you think?

2.Why is price always larger than marginal revenue for a monopoly?

3.What kind of firms choose to maximize profit?

4.What kind of firms maximize profit by setting MR=MC?

5.Give me an example of price discrimination that you have experienced, after reading about it.Or, tell me how the company you work for could effectively price discriminate with some new idea of yours