If XXX is a random variable such that MX(t)=(0.4+0.6et)nM_X(t) = (0.4 + 0.6e^t)^nMX(t)=(0.4+0.6et)n, what is the variance Var(X)Var(X)Var(X)?
0.24n0.24n0.24n
0.6n0.6n0.6n
0.4n0.4n0.4n
0.16n0.16n0.16n