Exercise:

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Solution:

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Some comments on the solutions I saw:

• In product-of-sums form, an input 1 leads to inversion and an input 0 leads to no inversion
• Don’t optimize when the exercise tells you not to optimize
• Some students drew circuits that were not sum-of-products or product-of-sums form
• It’s a lot faster to draw 2-level circuits without the input inverters