Is this right?

How much energy is stored in the 50mF capacitor when Va-Vb= 22V?
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For the parrallel of top25uF and bottom25uF, I got Ceq=25+25=50uF
For the series left50uF and right50uF, I got Ceq=1/50uF+ 1/50uF= 25uF as my final answer