Figure $1$ shows a MakeCode program which can be run on the Express. Take some time to read through and understand the code and recreate it in MakeCode so you can run it in the simulator or on your own Express.

a$.$Identify the inputs and outputs used in the program, and for each input, give a brief explanation of how it is used to determine the outputs.

b$.$Identify a real$-$world context in which this program could be useful.