Find all solutions to the system using the Gauss-Jordan elimination algorithm. 3x1​+6x2​+3x3​=−186x1​+3x2​−3x3​=03x1​+18x2​−6x3​=18​ Select the correct choice below and, if necessary, fill in the answer boxes to complete A. The system has a unique solution x1​=,x2​=,x3​= B. The system has an infinite number of solutions characterized as follows. x1​=,x2​=,x3​=s,−[infinity]