\[
x(t)=e^{-2 t} u(t)
\]

and

\[
\begin{aligned}
h(t) & =e^{-4 t} u(t) \\
y(t) & =x(t) * h(t)
\end{aligned}
\]

Using time convolution property find \(Y(j \omega)\) and \(y(t)\) ?