when prompted. Please select in the MCQ whether you have completed working on this question or not: Move on to the next question Ax=[[2],[4],[2]], is ,x=[[2],[0],[0]]+c[[1],[1],[0]]+d[[0],[0],[1]]. (a) What is the dimension of row space of A? (b) What is the matrix A ? (c) Describe exactly all the vectors b for which Ax=b can be solved. (Don't just say that b must b in the column space)