i$.$ Traffic Lights:

To develop a C program to simulate the control of traffic lights. Three output

ports are used to periodically control the Green, Yellow, and Red LEDs in the

following pattern:

Green LED is turned ON for $5$ seconds;

Yellow LED flicker for three times $($i$.$e$.,$ ON $0\mathrm{.}5s$ and OFF $0\mathrm{.}5s,$ and

repeat for three times$)$;

Red LED is tumed ON for $5$ seconds;

Caution: DO NOT forget to use resistors because directly connecting an

LED may result in a large current burning down the LED.

Fig. $3$ Colour LEDs and Resistors

ii$.$ Main Switch to Control the Traffic Lights:

Add a button switch to control all three traffic lights. When the button switch

is pressed down, all traffic lights are turned off. When the button switch is

released, the traffic lights return to their normal working state. A pull$-$up or

pull$-$down resistor may be used depending on your own code.

iii. Question to think:

Why the program doesn't respond to the switch input sometimes? Do you

have other solutions other than using the polling method? The i$.$Traffic Lights part i completed but i have no ideal for ii$.$ Main Switch to Control the Traffic Lights Please use "Tinkercad $"$ to complete the part ii and provide the model picture and code. thanks