I'm having trouble with this. In the lab they're asking me this:Determine the magnitude of a nearby magnet's field (like an earbud), subtracting for the room's field.Note: subtracting vectors is different from subtracting scalars.And the picture has the values of some headphones. We also took the room's field values:x -22.71y -38.19z -12.23Absolute 46.08 I don't know how to subtract these values. Maybe is easier than I think. I just need some help with this. If you need any other info let me know. Thank you.

GRAPH ABSOLUTE MULTI SIMPLE HELP Accuracy High Magnetometer Magnetometer x 66_72 pT Magnetometer y 3040 pT Magnetometer z 1 41 05 pT Absolute 158.97 pT