Answer the question in the screenshot and please explain the steps for solving the specific type of problem. Thank you.

9. A painting attributed to Vassallo (1620-1664?) was carbon-tested and contained 99.2% of its original carbon-14. Is it a forgery? If so, roughly what year do you believe it was forged? If not, roughly what year did Vassallo paint it? Remember, the half-life of carbon-14 is 5700 years