Question 4 (15 marks,C3)Find the conditions on b1,b2 and b3 so that the following linear system is consistent.x1-x2+2×3-2×4+3×5=b14x1-3×2+2×3-4×4+3×5=b2-7×1+4×2+4×3+2×4+6×5=b3When the linear system is consistent,how many free variables are there in its general solution?

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