Let the system of equations \( x + 2y + 3z = 5, \; 2x + 3y + z = 9, \; 4x + 3y + \lambda z = \mu \) have infinite number of solutions. Then \( \lambda + 2\mu \) is equal to:
\( 28 \)
\( 17 \)
\( 22 \)
\( 15 \)