Problem 10

Draw the Karnaugh maps for the following functions of variables p, q, r, and s.

1. a) The function that is TRUE if one, two, or three of p, q, r, and s are TRUE, but not if zero or all four are

   TRUE.

2. b) The function that is TRUE if up to two of p, q, r, and s are TRUE, but not if three or four are TRUE.

2

c) The function that is TRUE if one, three, or four of p, q, r, and s are TRUE, but not if zero or two are TRUE.

4. d) The function represented by the logical expression pqr s.

5. e) The function that is TRUE if pqrs, regarded as a binary number, has value less than ten.