Figure $($a$)$ is a class$-$AB power amplifier, while Figure $($b$)$ is a class$-$AB power amplifier utilizing a composite transistor to enhance voltage gain. Using LTSPICE, calculate the difference in DC voltage gain between Figure $($a$)$ and Figure $($b$),$ assuming the input voltage is biased at OV$.$ Define the transistor models with $".$model mynpn npn$($IS$=2$e$\backslash (16$ V A F$=5$ B F$=100\backslash ))"$ for NPN transistor and $".$model mypnp pnp$($IS$=3$e$-16$ VAF$=3\mathrm{.}5\backslash ($ B F$=50\backslash ))"$ for PNP transistor. Express your answer in units of V$/$V and round the value to three decimal places. For example, $10\mathrm{.}174$ when the raw value is $10\mathrm{.}1741.$

$($a$)$

$($b$)$