The table shows quiz marks out of 25 in each subject.   English Geography Mathematics Science Andy 77 74 81 30 Bill 81 56 91 93 Clive 51 65 77 84 1. What is the difference betweenClive's marks in English and Science?   2. How many more marks does Andy need for a perfect score in Mathematics?   3. In Geography, how many more marks did Andy get than Bill?   4. Find the difference between Andy's Science marks and Bob's English marks.   5. The Mathematics teacher gave Clive 57 extra marks by mistake. What are his real marks?