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The parameters of all elements in the circuit shown below are given: $R_1=3\mathrm{.}8k,R_2=23\mathrm{.}9k,R_3=2\mathrm{.}6k,C=2\mathrm{.}32F,$ and $=4\mathrm{.}5V($the internal resistance of the battery is negligible$).$

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The capacitor in this circuit is not charged when, at time $t=0,$ the switch si is closed. Then, at time $t=40\mathrm{.}07ms,$ the switch S $2$ is closed.

What i

$Q(t)=Q(t)$ on the capacitor at time $t=81\mathrm{.}26ms?$: W $.C.$

$q,$

What is the current $I_2(t)$ in resistor $R_2$ at time $t=81\mathrm{.}26ms?$:

$I_2(t)=q,$ mA$.$