I added individual steps for clarity. Note that g must be positive if the solution is to be real.

Let me know if you have any questions.
Answer
The capacitor should be connected in parallel as parallel connection gives the arithmetic sum of capacitance which will give a corresponding sum of energy while capacitors in series gives the sum of the reciprocal if the individual capacitance
The first scientist to show that atoms emit any negative particles was : J.J Thomson
Answer:
The answer is C because there is no friction there will be no friction force only applied and since its on ice you have to account for gravity
Explanation: