CAN ANYONE HELP ME WITH THIS QUESTION, THANK YOU SO MUCH

3. Consider an arbitrary system of linear equations Ax = b where the coefficient matrix A and constant term vector b have all real entries. (i) If Ax = b has more than one solution, then prove that it has infinitely many solutions. (ii) If there is a solution with entries in the complex numbers, then show that there is also a solution with entries in the real numbers