A door sensor is connected to the RB1 pin, and a buzzer is connected to RC7. Write a C language program to monitor the door sensor, and when it opens, sound the buzzer. You can sound the buzzer by sending a square wave of a few hundred Hz frequency to it. The buzzer remains active as long as the door remains open.

Hints: Planning on how to write the program and make use of flow chart.

Use two functions to:

implement a function called delay to be used in generating the square wave.

A function that generates a square wave called buz.