How to solve this?

4.2 b[7 points] You prepare a sample of carbon for your mass spectrometer. You're surprised when you nd two peaks: a large one centered around 12.000000 mass units (exactly where you would expect to nd 120 in your original universe), and a smaller one centered around 13.003355 mass units. The large peak has 59358 counts and the other peak has 642 counts. What is the abundance of 12C and 13C in this universe? What does the location of the two peaks tell you about the binding energy of nuclei in this new universe compared to your original universe? 50 55