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Provided R & S, where C = R + S. Where respective pdfs are f_r(R) =...

Provided R & S, where C = R + S. Where respective pdfs are f_r(R) = (r-4)e^(4-r); r>=4 and f_s(S) = e^(4-s); s>=4, now we need to find f_c(C)

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