Hello, I just have some small questions about linear algebra that are giving me some slight grief. I know how to find the number of free variables and the basis of the solution space. But what is confusing me is the A transpose... When doing the problem, would I firstly take the transpose of A and then row reduce the matrix to find the free variables? or would I do it the other way around? Secondly.. I've solved part a).. But I am stuck on part b) I have no idea where to start the problem or what to actually use to actually attempt solving this part. So a suggestion as to what I can actually do, would be very helpful! thank you in advance.