A tie circuit is a 1output 4input function that outputs a 1

A \"tie circuit\" is a 1-output, 4-input function that outputs a \"1\" when there .are exactly two 1\'s in the four inputs (like a \"tic\" in voting). Let the inputs be a, b, C, d and the output be f. Derive the truth table for this circuit. Derive the K-map and the simplified sum-of-products expression. Derive the circuit diagram with AND, OR, NOT gates.

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