Suppose a is the matrix a =   1 2 2 3 8 7 0 4 2   1 ). find all the special solutions to ax = 0? 2 ). describe, in words, the whole null space of a. 3 ). what is the column space of a? ”all combination of the four columns” is not a sufficient answer. 4 ). write the complete solution for the right hand side b = (2, 7, 2).