By means of a sequence chart, design a ladder diagram for the sequence: START, A+, B+, B-, A- Using 5/2 valve with double solenoids and show the sequence chart. Assume that the operator might keep pressing down the start button the whole time and design according to that. Assume both cylinders are in the fully retracted positions. Indicate NO, NC on the ladder diagram. Problem 2: By means of a sequence chart, design a ladder diagram for the sequence START, A+, B+, (A- B-) Assuming cylinder-actuating valves with double solenoids. Assume both cylinders are in the fully retracted positions. Indicate NO, NC on the ladder diagram Problem 3: Repeat problem 1 but assuming that Valve A has one solenoid with a return spring and B has double solenoids