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A: The objective is to find the value of theta.

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A: The details solution is given bellow.

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A: Given                                            uyy=4uxx,   u(0,y)=u(5,y)=u(x,0)=0, uy(x,0)=3,…

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A: Since you have submitted two questions, we'll answer the first question. For the second question…

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A: NOTE-Since you have asked multiple question, we will solve the first question for you. If youwant…

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