Let A be a 6x4 matrix of rank 4
(a) What is the dimension of N(A)? what is the dimension of the colum space of A?
(b) Do the column vectors of A Span R6? Are the column Vectors of A linearly independent? Explain you answers.
(c) how many solutions will the linear system Ax=b have if b is in the column space of A/ Explain