Use the circuits from Exercises 10 and 11 to find the difference of two four-bit integers, where the first integer is greater than the second integer.
10.Construct a circuit for a half subtractor using AND gates, OR gates, and inverters. A half subtractor has two bits as input and produces as output a difference bit and a borrow.
11. Construct a circuit for a full subtractor using ND gates. OR gates, and inverters. A full subtractor has two bits and a borrow as input, and produces as output a difference bit and a borrow.
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