Chapter 5, Problem 9P

Write the ladder logic program needed to implement each of the following (assume inputs A, B, and C are all normally open toggle switches):

1. a. When input A is closed, turn ON and hold ON outputs X and Y until A opens.
2. b. When input A is closed and either input B or C is open, turn ON output Y; otherwise, it should be OFF.
3. c. When input A is closed or open, turn ON output Y.
4. d. When input A is closed, turn ON output X and turn OFF output Y.