1. In an automatic mixing operation the sequence of operation is as follows: When the start button is pressed fill the tank with Liquid B till it reaches X1 and then fill the tank with Liquid A till...

Extracted text: 1. In an automatic mixing operation the sequence of operation is as follows: When the start button is pressed fill the tank with Liquid B till it reaches X1 and then fill the tank with Liquid A till it reaches X2. Once the level of Liquid reaches X2, turn on the motor for another 20 seconds for mixing process. After the timer stops timing, empty the tank by opening the mixture outlet. X1 and X2 are capacitive proximity sensors and there are start, stop and emergency stop push buttons. XO START X1 STOP YO (Liquid A Inlet ) EMERGENCY STOP YI(Liquid B Inlet) Y2(Mixture Outlet) For the system explained above answer the following: a) Provide the Allocation List b) Draw the Grace and extract the grafcet equation c) Draw the Ladder Diagram