Create the combinational circuit for the following problems. Show the complete truth table and the propositional expression for each of its output. Simulate using a circuit simulator using switches as inputs and LED as output indicators. Use only 2 input logic gates in the design. Then provide a screenshot of 2 different input values with its output.

1. Design a 4 by 1 multiplexer allowing 4 inputs and 1 output. Label the inputs as ABCD and the output X.

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