determine the probability that a student at chosen random will work next year

A group of 100 students are interviewed to find out whether they are going to study or work after they finish matric. 43 say that they are going to study, 25 say they are going to work, 10 say they are going to do both and the rest say that they don't know. Dont KNOW work 2.1 Draw a Verin diagram to represent the above information. 2.2 Determine the probability that a student chosen at random will work next year? 2.3 What is the probability of choosing a student that will either study or work next year? 2.4 What is the probability of choosing a student that does not know what he/ she wants to do next year? 2.5 What is the probability of choosing a student that is going to both study and work next year