12. True or False? ) (a) for system of linear equations A? : b , if the rank of A is less then the rank of [Al1;] then the system does not have solution. (b) for system of linear equations A? e b , If the rank of A equals the rank of [Al6)} then the system has a unique solution. _, (0) system of linear equations A? = T9) always has solution, where T923 a zero vector. (d) linear transformation always has inverse linear transfonnation. (e) if the product of two matrices is a zero matrix, then at least one of them must be a zero matrix