Fig. $1$

$1.12$ points A shunt voltage regulator $($Fig$.1)$ consists of a zener diode supplied by a constant current of $10$ mA $.$ At this operating current $($without load resistance$)$ the zener resistance is $\backslash (5\backslash$Omega $\backslash )$ and the zener voltage is $6\mathrm{.}8$ V $.$ Please answer the following questions.

$($a$)$ If the regulator is loaded by a resistor of $\backslash (2\backslash$mathrm$\{$~K$\}\backslash$Omega $\backslash ),$ what is the output voltage? $(5$ points$)$

$($b$)$ If the regulator is loaded by a resistor of $\backslash (200\backslash$Omega $\backslash ),$ what is the output voltage? $(5$ points$)$

$($c$)$ Is breakdown of a diode normally destructive? $(2$ points$)$