The system of equations Ax = c has solutions I -2 -2 3 -1 -4 _ _ x = 4 + p 1 + q 4 The solutlon set of the system Ax = 0 conSIsts of all vectors x = -3 2 0 \fA consistent system of linear equations in 9 unknowns is reduced to row echelon form. There are then 5 non-zero rows (i.e. 5 pivots). How many parameters (free variables) will occur in the solution