3. Indicate the dots required to be connected (1 to 8) to implement a NOR function using the PLD AND array shown below:

  1. Dots at 3, 8
  2. Dots at 2, 4, 7, 8
  3. Dots at 2, 4 (only)
  4. Dots at 5, 7, 1, 2
  5. Dots at 5, 7 (only)

2 is WRONG. Placing dots at 2,4,7, and 8 yields 

I1I2 + I2'I2 = I1I2 + 0 = I1I2,
which is the AND function.

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