hello, please help this question, (the R is 6, that means R=6), with very clear steps and explanation for it

Mary takes a (10 + R)-question MC quiz with FIVE choices for each question and guesses randomly on each question. Each question carries ONE mark. Threshold score for passing the quiz is W0 marks. (i) What is Mary's chance of getting ONE mark only for the quiz? Correct your answer to 4 decimal places. (1 mark) (ii) What is Mary's chance of passing the quiz? Correct your answer to 4 decimal places. (2 marks) @ If Mary takes the same quiz 200,000 times. what is the average score she is expected to get? (I mark) (b) There is a [5% chance that Ming will be COVIDinfected, a 8% chance that Ting will be COVlD-infected and a 10% chance that Ming but not Ting will be COVlD-infected. Let M be the event that Ming will be COVlD- infected. and T be the event that Ting will be COVlD-infected. (i) By completing the probability matrix given in the answer script, nd the probabilities P(T 3!. M), P(T&),P(T&Fl) and PCT (WM). (4 marks) (ii) Given that Ming is COVlDinfected. what is the chance that Ting will be COVID infected? Correct your answer to 4 decimal places. (2 marks)