Solve Ax=b by finding coefficients for the columns of A which show b lies in their span. When solving Ax=b the solution x can be determined by determining the linear combination of the columns of A which equal b. In the interactive cell below A1 represents the first column of A, A2 represents the second column of A and A3 represents the third column of A. Determine values of x1, x2 and x3 so that x1A1+x2A2+x3A3=b .