Neco 2019 Data Processing Question 27

A school keeps a spreadsheet of five students' scores in Mathematics, Physics and Chemistry. The credit units are 3 for Mathematics, 4 for Physics and an unknown number \(x\) for Chemistry. The total credit units for each student are 12. The grade‑point mapping is: score \(\ge 70\) → 5 points, 60-69 → 4 points, 50-59 → 3 points, 45-49 → 2 points, below 45 → 0 points.\n\nThe scores are:\n\n| Student | Mathematics | Physics | Chemistry |\n|---------|--------------|---------|-----------|\n| A | 78 | 65 | 55 |\n| B | 82 | 58 | 48 |\n| C | 69 | 71 | 62 |\n| D | 55 | 60 | 70 |\n| E | 90 | 85 | 80 |\n\nUsing the given information, determine which student has the highest GPA and state that GPA (rounded to two decimal places).