JFET Amplifier Exersice
Source is not bypassed by a source bypass capacitor
  


Yet you clearly have the source bypassed in your diagram A. So that'd get you that question wrong.

I see the issue you have. If you assume gate leakage is zero, then you can't possibly solve for what your professor asks. However, you aren't provided the gate leakage current. Gate leakage is practically impossible to guess. So, you are right to be confused.