please help me on my assignment on this 3 questions. I badly need help! please I will rate you! god bless you and thank you

Let A and B be two finite sets SLICh 2 points that n(A) = 20, n(B) = 28 and n(A U B) = 36, find P(A n B). Your answer should be a fraction in simplest form. * Your answer The Venn Diagram shows a survey of students who do different sports. What is the probability of students play all three sports? Your answer should be a fraction in simplest form. * 1 point The Venn diagram below shows the result of a survey done by a Grade 10 teacher among the 250 Grade 10 students. 120 registered for Science class, 205 registered for a Math class and 75 were registered for both classes. What is the probability that a student registered for Math class or Science class or both Math and Science classes? (Convert your answer into a percent) * '2 points