1) (80 points) Derive the expression of the optimal packet size Smax that maximizes the efficiency. Express Smax as a function of the bit rate br, the propagation time Tp, and the bit error rate ber. (Hint: a function f(x) is optimal for some value x0 if and only if f'(x0)=df(x)dx=0. In other words, derive the function f(x) and solve f'(x0) = 0.

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Amanda needs to create an informative print brochure for her local library’s fundraiser dinner. what critical detail must she have before she starts designing the brochure?