Evaluate the Improper Integral $\int _ { 0 } ^ { \infty } x ^ { 5 } e ^ { - x ^ { 5 } / 6 } d x$

Multiple Choice

Evaluate the improper integral: $\int _ { 0 } ^ { \infty } x ^ { 5 } e ^ { - x ^ { 5 } / 6 } d x$ Round to two decimal places, if necessary.

A) 1.5
B) 2
C) 1
D) Undefined