Problem $3)$ Given a PIC$24$ processor with three outputs for controlling three LEDs:

RB$0($RED$),$ RB$1($YELLOW$)$ and $($RB$2)$ GREEN.

$($a$)$ Draw the circuit diagram $($includes LEDs and Resistors$).$ Assume maximum

current flows in each LED is $1$ mA $.$

$($b$)$ Write a code initialize the I$/$O and implement the following traffic light state

machine:

Assume you are given two functions:

start$\_$timer$()$ : to start timer $($count seconds$)$

is$\_$expired$($uint$8$ interval$)$: returns $1$ if the timer seconds is greater than interval,

otherwise return $0.$