a. Write a program to remove defective part from a conveying system at five positions later from the inspection point using shift registers. b. Write a program to flash a lamp continuously once a push button is pressed. Flashing will stop automatically after 45 seconds c. Write a program to start and stop a system using a single push button. d. Write a program to separate boxes A or B using pneumatic actuators. Sensors at different levels are used to differentiate between boxes A and boxes B. Two sensors (S1 & S2) are used to check for the presence of the metallic strips and a (1,0) indicates a box A while a (1,1) indicates a box B is present.