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0.084 = 4.4/$$4\pi r^2$$
$$4\pi r^2$$ = 4.4/0.084
Initial charge = 0.076 × $$4 \pi r^2$$
R = 2.04 cm
Initial charge = 0.076 × 4.4/0.084 = 3.98 C
Capacitance = $$4 \pi \epsilon_0 r$$ = 2.26 × 10^-14 F

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