How much interest does Prosper charge?

I'm curious about the interest rates that Prosper imposes on borrowers. Could you elaborate on the specifics of their charging structure? Do they have fixed or variable rates? Are there any hidden fees or penalties that borrowers should be aware of? Additionally, how does Prosper's interest rates compare to other peer-to-peer lending platforms in the market? It would be insightful to know the factors that determine an individual's interest rate and how Prosper assesses creditworthiness.