A $24\mathrm{.}0-V$ battery is connected in series with a resistor and an inductor, with $R=4,80$ and $L=9\mathrm{.}40H,$ respectively,

$($a$)$ Find the energy stored in the inductor when the current reaches its maximum value.

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$($b$)$ Find the energy stored in the inductor at an instant that is a time interval of one time constant after the switch is closed,

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