Question 4:For each of the following statements, determine if it is true or false. Justify your answer. (1) The linear system 3 2r - 2y = cannot have a unique solution. (2) A homogeneous system in n unknowns whose corresponding augmented matrix has rank r has n - r nonleading variables. (3) For all square matrices A and B of the same size, it is true that (A + B)2 = 12 + 2AB + B2 (4) Every real number is also a complex number