Find the Angle Between the Two Planes $\begin{array} { l } x - 4 y + z = - 3 \\3 x + 3 z + 4 = 0\end{array}$

Multiple Choice

Find the angle between the two planes. $\begin{array} { l } x - 4 y + z = - 3 \\3 x + 3 z + 4 = 0\end{array}$

A) 71.5 $^\circ$
B) 72.5 $^\circ$
C) 73.5 $^\circ$
D) 70.5 $^\circ$
E) 69.5 $^\circ$