If the current i$($t$)$i$($t$)$ for an element is $8\mathrm{.}6$t$8\mathrm{.}6$t A for t$0$t$0,$ and $9\mathrm{.}4$t$9\mathrm{.}4$t A for t$0$t$0.$

Find:

$($a$)$ i$(9\mathrm{.}3)$i$(9\mathrm{.}3)$

$($b$)$ i$(5\mathrm{.}3)$i$(5\mathrm{.}3)$

$($c$)$ The total charge that has passed through the element in the interval $9\mathrm{.}3$t$5\mathrm{.}39\mathrm{.}3$t$5\mathrm{.}3$

$($d$)$ The average current that has passed through the element in the interval $9\mathrm{.}3$t$5\mathrm{.}39\mathrm{.}3$t$5\mathrm{.}3.$

$($a$)$ : A

$($b$)$ : A

$($c$)$ : Coul.

$($d$)$ : A