The circuit shown in the figure consists of a charged capacitor of capacity $3 \mu \mathrm {~F}$ and a charge of $30 \mu \mathrm { C }$. At time $t = 0$, when the key is closed, the value of current flowing through the $5 \mathrm { M } \Omega$ resistor is $x \mu \mathrm {~A}$. The value of $x$ to the nearest integer is\\
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