Lab-4: Time-Division MultiplexingObjectivesIn this lab, you will be introduced to the method of time-division multiplexing which uses a type of circuitcalled a demultiplexer. You will also learn about the Arithmetic Logic Unit and see how multiplexers are used within it.1 Pre-labPrelab submissions will be done through .Prelabs are due at 9am on the day of your lab. Failure to do so may cause you to lose marks for your pre-lab!The pre-lab template is found here: .TODO (pre-lab): Fill out the Prelab TODOs included inside the prelab4.tex file and submit it online!2 DemultiplexersTODO: Using the circuit diagram from the third TODO of your prelab, implement a 1-to-2 demultiplexer on the Magic Box. Leave enough room on your breadboard to wire up a multiplexer for the next part of this lab. Verify that it works as anticipated and then show it to your TA.Next, you will be implementing a multiplexer-demultiplexer scheme on the Magic Box. The instructions below detail this process:1.Wire up a 1-of-2 multiplexer chip (LS157) next to your demultiplexer. Connect power, ground, and the enableinput. (Remember from Lab 3 that enable should be low.) Also connect one pair of inputs, a and b,to two switches.2.