hi please help me descriptive statistic. please provide the step calculation, formula and clear writing.

a) How many different arrangements can be formed by using all letters of word QUARANTINE if the first letter must be 'R'? (2 marks) b) There are two events, X and Y with P(X) = 0.35 and P(Y) = 0.4. i) If X and Y are independent events, illustrate the events using Venn Diagram. (5 marks) ii) Find P (X' and Y). (1 mark) iii) Find P (X or Y'). (1 mark)c) An insurance company classies drivers as lowrisk, mediumlist: and highrisk. Of those insured, EG% are lowIisk, 3G% are mediumrisk and 10% are highrisk. After a study, the companyr nds thatduring a year period, 1% of the lowrisk drivers had an accident, 5% of the mediumrisk drivers had an accident and 9% of the highrisk drivers had an accident. i) Draw a tree diagram to illustrate the above situation. (3 marks) ii} Find the probability that the drivers did not have an accident. {2 marks) iii) Given that the drivers had an accident, what is the probability that they insured are mediumrisk