Question: Please explain step by step. Thank you! 4. (4 pts) What is the energy S[u](t) for the wave equation in um : 0'? (1 pt)

Please explain step by step. Thank you!

4. (4 pts) What is the energy S[u](t) for the wave equation in\" um : 0'? (1 pt) Derive that for a solution in of the wave equation u\" um = 0 on the nite interval :3 6 (0,1) with the zero Neumann conditions uz|m=0 : um|m=l : 0: your energy E [u](t) is constant in time. (3 pts)

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