I have attached the question.
To calulate , I put in a matrix form as follows
1 1 2 -1
2 4 1 -1
and made that equal to the zero vector
0
0
I row reduced it with leading ones,
however I don't know what to do from there - and I certainly am not sure how the calculate the Image of either nor the others.
Hints and advice will be very much appreciated, thank you.