Answer:
Step-by-step explanation:
There is a "?" mark in the amount of energy stored.I am taking it as 1.65*10^-2 J. I am also mentioning the formulae used to solve the problem.If the energy value is different from the one i used then plug into the formula correct energy value and get solution
(a)Energy stored by a capacitor =

(b)
![f = \frac{1}{(2\pi √(LC))\\\\</p><p>L =(1)/((2\pi f)^(2)C))\\\\</p><p>L =(1)/((2\pi * 3500)^(2)* 229* 10^(-6))\\\\L = 9.03* 10^(-6) H]()