A, B,C and D are members of the board of trustees of an investment company. Decisions are made by the following criterions. A BUY order is placed if:
· A, B and D vote no and C votes yes,
· Or A and C vote no and rest vote yes,
· Or B and C vote yes and rest vote no,
· Or B votes yes and others vote no,
· And it is impossible for C and D to vote yes simultaneously.
Answer the followingquestions:
a. Are there any don't care conditions? If yes, indicate them.
b. Design a simplified logic circuit (equation + diagram) that will make the BUY decision for these confused stock brokers.