Determine the minimum input voltage $(V_{in})$ needed to trigger the SCR $,$ for the circuit shown below. Given: $V_{GT}=0\mathrm{.}75V,I_{GT}=8mA,I_H=6\mathrm{.}5mA$

c$.,0\mathrm{.}75V$

$($c$)6\mathrm{.}75$ V