In Cirsim below, drag in a Pad and a Traffic Light. A Pad is a $16-$button keypad. There are two outputs. The top output is $4-$bit bus output that is set to the value of the last pressed button. If you press the $"$C$"$ button, the output will be $0$b$1100,$ or $0$xc$.$ The bottom output is true when a button is pressed. You will not need that output for this circuit.

The traffic light has three inputs for the red, yellow, and green lights. This is a table that maps a Hex keypad button to a light for the traffic light:

Create a circuit that will set the appropriate traffic light color when a button is pressed. For example, if the F button is pressed, the traffic light is red. The top red input should be true and the other inputs false. If the D button is pressed, the traffic light is yellow. If the $6$ button is pressed, the traffic light is green.

This is just a combinatorial circuit. It will require three equations. For each, create a truth table, minimize the expression, and implement that.

If you think about it$,$ there is a way to solve this problem with only two equations and about $2/3$ as many components!

I have included a picture of what I have in my diagram but the test fails at $19$ Expected yel$=1$ but got yel$=0.$ Please give me a fix of what is wrong with my circuit and how i can fix it$.$ A diagram would be helpful.