0 --------------] b₂ = 10 a. Find A¹ and use it solve the four equations Ax=b₁, Ax=b₂ Ax=b3, and Ax=b₁ Let A= 12 5 12 -1 3 and b = b. The four equations in part (a) can be solved by the same set of operations, since the coefficient matrix is the same in each case. Solve the four equations in part (a) by row reducing the augmented matrix [A b₁ b₂ b3 bal. 0 a. Find A Select the correct choice below and, if necessary, fill in the answer box to complete your choice OA. The inverse matrix is A-1 (Type an integer or simplified fraction for each matrix element.) OB. The matrix is not invertible.

For the following systems of equations find the reduced row echelon form of the augmented matrix (write down both the augmented and the RREF) and then find all solutions that exist.  *picture attached* please do it in handwriting and not typing, or in a way so that its easier to read

kindly answer it