Calcule statistics and derive the damping ratio of oil spill

I need to know how to proceed to calculate the statistics and volume of an oil spill that occurred on October 7, 2018 using SNAP.
I already have the mask of the spill but I have difficulties in knowing how to proceed with the SNAP.

Thank you

If you already have a mask you can use the Statistics Tool to know how many of your pixels are included in your mask, including some basic statistics (mean, std, min, max). Other calculations you will have to do outside SNAP.