Please ANSWER ONLY 1hr for my exam !!!!!

Question 3 As a junior engineer joining a new company, you have been tasked to analyse an unfinished legacy code left by your predecessor. The code is part of an ongoing project. The project includes converting an analogue signal to digital. The analogue input is 3 Vp varying between 1 V and 4 V at a frequency less than 100 Hz. The signal source is directly connect connected to pin (ANO) of a 20 MHz PIC18F252 Microcontroller. You have been told by your project manager that the code is not working as expected". The following is the code used achieving that task: Winelude