A science class was given two tests. Test 1 was given at the start of the term and Test 2 at the end of the term. As part of a review of pupil progress, the teacher prepared a bar chart showing achievement in the two tests. Which of the following statements are true (tick all)? 0 Ta\" Ell I I I112 II I II'II III 21-10 11-60 51-80 11* delkmd 100 A. 1/2 of pupils achieved less than 41 marks in Test 1. B. More than 50% of pupils achieved more than 41 marks in Test 1. C. More than 80% of pupils achieved more than 40 marks in Test 2. D. The number of pupils achieving 81+ marks increased by 50% from Test 1 to Test 2. E. Less than 5 pupils had a mark of 40 or less