In a class of 40 social sciences students, 10 are not showing any covid-19 signs and every student of the remaining 30 has high fever, chest pain or both. If 15 have high fever and 25 have chest pain, i. Determine the number of students that have high fever and chest pain. (2Marks) ii. If a student is selected randomly from this group, what is the likelihood that he/she has;

1. High fever (2Marks)
2. Has chest pain (2Marks)
3. Has high fever and chest pain (2Marks)
4. Has either high fever or chest pain (2Marks)