(Solved): Solve the system using Gaussian elimination or Gauss-Jordan elimination. x1 - 5x2 + 2x3 = 6 5x2 - ...

Solve the system using Gaussian elimination or Gauss-Jordan elimination. x1 - 5x2 + 2x3 = 6 5x2 - 2x3 = ?1 -3x2 - 4x3 - 5x4 = -30 5x? + 4x? + 4x3 + 5x4 = 56 Select one: O a. {(-5, -1,3,3)} O b. {(5, 1, ?3,?3)} O c. {(5, 1, 3,3)} O d. {(-5, -1, ?3,?3)}