Given X∼Chi-Squared(k=4)X \sim \text{Chi-Squared}(k=4)X∼Chi-Squared(k=4), what is the value of the MGF MX(t)M_X(t)MX(t)?
(1−2t)−2(1-2t)^{-2}(1−2t)−2
(1−2t)−4(1-2t)^{-4}(1−2t)−4
(1−t)−2(1-t)^{-2}(1−t)−2
e4te^{4t}e4t