Create a truth table of the function prime(a, b,c, d) where a, b,c, d are the bits of a 4-bit number. a is the highest significant bit and d is the least significant.

The output is 1 for:

Step-by-step explanation:

The first step is creating the truth table, from the most significant bit to the least significant. Then, each value is converted to decimal, like these two examples:

After the conversion, if the decimal equivalent of the 4-bit number is prime, the output is 1.

So, the output is 1 for 1,2,3,5,7,11,13

So

A - B - C - D - Decimal - Output

0 - 0 - 0 - 0 -       0       -    0

0 - 0 - 0 - 1  -        1       -     1

0 - 0 - 1 - 0 -         2      -     1

0 - 0 - 1 - 1 -          3      -     1

0 - 1 - 0 - 0 -         4      -    0

0 - 1 - 0 - 1 -          5      -     1

0 - 1 - 1 - 0 -          6      -    0

0 - 1 - 1 - 1  -          7      -     1

1 - 0 - 0 - 0 -         8     -      0

1 - 0 - 0 - 1 -          9     -      0

1 - 0 - 1 - 0 -          10    -      0

1 - 0 - 1 - 1  -          11     -      1

1 - 1 - 0 - 0 -          12    -      0

1 - 1 - 0 - 1 -           13    -       1

1 - 1 - 1 - 0 -           14   -        0

1 - 1 - 1 - 1 -            15   -        0