Q$.2($a$)$ A current source, $I(t)$ is given in Figure Q$.2($a$)$:

Figure Q$.2($a$)$

$($i$)$ What is the period of the signal, $T_0?$

$($ii$)$ Determine the radian frequency of the signal, ${}_0.$

$($iii$)$ Write the signal expression of $I(t).$