XOR gate and other logic gates design?

TJ Chu

New member
1) Using only inverter, AND & OR gates, design an XOR gate.
2) Using NAND, AND OR, &/or NOR gates build a vote counting machine. It should light an LED when majority votes are true (or answer "yes"). Assume 4 input votes only.

For #2 I was thinking of two OR gates with 4 inputs in total and summing up to an AND gate, but that only shows me whether the "yes" votes were 2 or less.
 
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