Describe the null spaces (lines or planes) of these particular matrices:
a) The null space of a matrix represents the set of vectors that, when multiplied by the matrix, result in the zero vector.
b) The null space of a matrix is the set of all vectors x such that Ax = 0 , where A is the given matrix.
c) The null space of a matrix is also known as the kernel of the matrix.
d) The null space of a matrix can be visualized as the set of all vectors that are mapped to the origin under the transformation defined by the matrix.