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Energy Stored in a Magnetic Field

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Hi. Can someone please show me how to do the following problem? I am not too sure how to approach it.

Question: Given an RL circuit in which there's a 9.0 V battery, R = 5.5 ohms, L = 6.1 mH, and there's a switch that can be opened or closed, how much energy is stored in the inductor after the switch has been closed a long time?

Thank you.

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This solution provides the necessary information required to solve for the answer to this physics based question and gives the final answer in the appropriate units.

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