There is not much to be said about the results. They are rather good, as usual when one just asks for things that have been said more or less 1:1 in the lecture 🙂 The first question was often answered wrong but I admit that the formulation of the ‘wrong’ option can be debated. But what I tried to explain (you remember the drawing with the hatched ion regions?) was that it is a modified data extraction for a total ion current. Option 1 is not wrong but it is not mass defect filtering.