Of the total candidates in an examination. 45% students passed in Maths, 55% in Science and 60% in Computer. 20% students passed in both Maths and Science, 25% in Science and Computer, and 20% in Computer and Maths. If every student passed at least one subject, (i) draw a Venn-diagram to show the above information. (ii) Calculate the percent of students who passed in all the three subjects.