D$2\mathrm{.}40$ Design a diode clamper to generate a steady$-$state output voltage $v_O$ from the input voltage $v_{\text{I}}$ shown in Figure P$2\mathrm{.}40$ if $($a$)V_{}=0$ and $($b$)V_{}=0\mathrm{.}7V.$

$($b$)$

Figure P$2\mathrm{.}40$