1. The problem statement, all variables and given/known data See Attachment. 3. The attempt at a solution For the first two questions, I know I have to sub in values for a and b. But, i'm not sure what the output matrix is. The 3rd q, to prove B is Basis for R^3. I just have to row reduce [(1,5);(1,6)] to get [(1,0);(0,1)] right? But like before, I don't know how to do b). Any help is appreciated.