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Hello, here we are with the answers to the given question.
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Let's start for the discussion.
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In this scenario, we require to design a decade to design a decade counter.
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This is what is required to do.
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So for this, we are asked to follow some steps and this would be acting as some methods.
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So let's consider the methods that will follow 2, 4, 2, 1 pattern.
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Let's have a look on to the steps which would be used as instructions or inputs later on.
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So you have to use a flip flop.
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This is the first step.
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Then you have to again use what is called nand gates.
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This is the second step.
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Then you need to connect the output...