1. The problem statement, all variables and given/known data Where x, y, and z are unknown variables and a and b are parameters, find all values a and b for which this system has (a) no solution (b) infinitely many solutions, and find the solutions (c) a unique solution, and find the solution when a=b=1. matrix=[2 -1 1 a; 1 1 2 1; b 3 3 a] (where each ; denotes a new line in the matrix, so the matrix is 3 rows by 4 columns. And btw it is an augmented matrix). 2. Relevant equations 3. The attempt at a solution I don't really know where to start! I know I have to somehow get the system into REF first, but it seems impossible because of the variables. I know that for (a) I have to somehow get a line that is something like [0 0 0 a] or [0 0 0 b] where a/b is not zero.