Solve the System by Back Substitution $\left(-\frac{4}{3}, 9,-4,2\right)$ B) $\left(\frac{14}{3},-9,-4,2\right)$ C) $(2,-9,-4,2)$ D) $(6,-13,-4,2)$

Multiple Choice

Solve the system by back substitution.
-6 x+2 y-3 z-5 w & =12
Y-2 z-5 w & =-11
5 z-2 w & =-24
4 w & =8

A) $\left(-\frac{4}{3}, 9,-4,2\right)$
B) $\left(\frac{14}{3},-9,-4,2\right)$
C) $(2,-9,-4,2)$
D) $(6,-13,-4,2)$