Implement the following Boolean function with a 4 x 1 multiplexer and external gates. Connect inputs A and B to the selection lines. The input requirements for the four data lines will be a function of variables C and D. These values are obtained by expressing F as a function of C and D for each of the four cases when AB = 00, 01, 10, and 1 1. These functions may have to be implemented with external gates. F(A, B, C, D) =Σ(1, 3, 4, 11, 12, 13, 14, 15)

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