3 inputs to a binary calculator logic gate circuit. The first two bits are reserved for 1 operand, the last bit is the second operand.

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The question was: Create the necessary Boolean equations based on the scenario below. Simplify the equations depending on the output if necessary. There are 3 inputs to a binary calculator logic gate circuit. The first two bits are reserved for 1 operand, the last bit is the second operand. There would be only three output bits that will communicate the result to communicate it later in decimal. Create a logic gate circuit that will support all sums of every input.

This is how we got the truth table using this table.

in3 in2 in1
out3 out2 out1
2⁰
4 2 1

We have arrived at the this truth table:

in1 in2 in3 out3 out2 out1
1 1 1 1 0 0
1 1 0 0 1 1
1 0 1 0 1 1
1 0 0 0 1 0
0 1 1 0 1 0
0 1 0 0 0 1
0 0 1 0 0 1
0 0 0 0 0 0

I'm lost on how we arrived at the resulting truth table above using the table before the truth table.