What is the system's potential energy when its kinetic energy is equal to 34e?

Otal energy= PEmax on the spring = KEmax of the oject 
Total Energy= KE+PE at v or x not maximum. 

Using the second line 
E= 3/4 E + PE 
PE = 1/4 E 

PEmax =E = 1/2 kA^2 
PE=E/4 = (1/2)kA^2 / 4= kA^2/8 

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Ithink the answer would be a