1. The problem statement, all variables and given/known data Peter was diagnosed with a tumour in his brain last week. According to his father, he has beem using his newly brought handphone to chat with his friends for long hours for long hours every night. This led to suspicion that the tumour was due to the prolonged exposure to radiation from the mobile phone. 2. Relevant equations 1.)How would you like to carry out the investigation? 2.)Is doing an experinment necessary? 3. The attempt at a solution I have find the information regarding the question , did not know how to carry out the experiment/doing an experiment necessary?