a$)$ Implement a state machine based car wash controller. The switches and pushbuttons may be used to simulate signals from payment systems, code entry systems, vehicle location sensors$,$ error sensors$,$ etc. The LEDs and$/$or Seven Segment Display can be used to indicate system status, which wash product is being dispensed, forward$/$stop$/$backup indicators, time remaining in cycle, etc. The user must be able to select at least two different wash types which will change the time and number of products being dispensed