If $Y =\sum_{i=1}^{14} X_i$ and every $X_i$ is i.i.d with a chi-squared distribution with $14$ degrees of freedom, find the MGF of Y.
$M(t)=$
What is the distribution of $Y$?
Select all that apply. There may be more than one correct answer.

A. $chi-squared(df = 196)$

B. $gamma(\alpha = 1, \beta = 1/196)$

C. $exponential(\lambda = 196)$

D. $chi-squared(df = 98)$

E. $gamma(\alpha = 1, \beta = 1/98)$

F. $exponential(\lambda = 98)$

G. $gamma(\alpha = 98, \beta = 2)$

H. $gamma(\alpha = 2, \beta = 196)$

I. None of the above