common Data for Questions $(28$ and $29)$:

A canter is shown below

Q$.28$ The counter shown is

$($a$)$ Mod$-12$

$($b$)$ Mod$-9$

$($c$)$ Mod$-14$

$($d$)$ None of these

Q$.29$ Frequency of output $Q_D$ for $1MHz$ clock is

$($a$)63\mathrm{.}3kHz$

$($b$)83\mathrm{.}3kHZ$

$($c$)73\mathrm{.}3kHz$

$($d$)$ None of these