A spring-block system sits on a horizontal, frictionless surface. The spring has a spring constant k = 238 N/m. The mass of the block is 6.5 kg. The spring is stretched out and released at t=0.00 s. The block undergoes simple harmonic motion. if the magnitude of the block's acceleration at t= 2.6 s is 12.2 cm/s², determine the total energy (mJ) of the spring-block system? Give answer to two places to the right of the decimal. Note: angular quantites should be in radians.

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