Gce Model Questions Vol1 2021 Computer Studies Question 8

You are required to develop a Python program that processes a text file named **students.txt**. Each line of the file contains a student's name followed by three integer test scores, separated by commas, for example: ``` Ada,78,85,92 Bola,64,70,58 Chinwe,90,88,95 ``` The program must: 1. Read the data safely, handling possible missing scores or extra whitespace. 2. Compute a weighted average for each student where the first test counts 20%, the second 30% and the third 50%. 3. Determine the class average (mean of all students' weighted averages) and the pass rate (percentage of students whose weighted average is at least 60). 4. Produce a neatly formatted report that lists: - The top three students by weighted average (show name and average); - The overall class average rounded to two decimal places; - The pass rate as a percentage rounded to one decimal place. 5. The program must use at least one user‑defined function, a list comprehension, and appropriate exception handling. Write the complete Python code that fulfils the above requirements and briefly explain how each part of the code meets the specifications.