$14\mathrm{.}56$ Determine the output voltage, $v_o(t),$ in the circuit in Fig. P$14\mathrm{.}56($a$)$ if the input is given by the source described in Fig. P$14\mathrm{.}56($b$).$

$($a$)$

Figure P$14\mathrm{.}56$

Find $v_o(t)$ at $t=1.$