Student A and Student B take a final examination in Discrete Structures. The probability that Student A passes is 0.75, and the probability that Student B passes is 0.8. Let the events "Student A passes the final examination" and "Student B passes the final examination" are independent. Find, i. probability that Student A does not pass (1 Mark) ii. probability that both pass (2 Marks) iii. probability that both fail (2 Marks)