$($a$)$ Write a python program that simulates a traffic light. The program should consist of the following:

$(5)$

i$.$ A user defined function trafficLight $()$ that accepts input from the user, displays an error message if the user enters anything other than RED, YELLOW, and GRFEN. Function light $()$ is called and following is displayed depending upon return value from light $.$

"STOP, your life is precious" if the value returned by light$($ is $0.$

$-$"Please WAIT, till the light is Green $"$if the value retumed by light $O$ is I

$-"$GO$!$ Thank you for being patient" if the value returned by lighto is $2.$

ii$.$ A user defined function light that accepts a string as input and returns $0$ when the input is RED, $1$ when the input is YELLOW and $2$ when the input is GRFEN. The input should be passed as an argument.

iii. Display $"$ SPEED THRII LS BUT KIL LS$"$ after the function trafficl ight$()$ is executed.