please answer the following systematically, show the complete solution

15. The probability that a married man watches a certain television show is 0.4 and the probability that a married woman watches the show is 0.5. The probability that a man watches the show, given that his wife does is 0.7. Find the probability that a) A married couple watches the show b) A wife watches the show given that her husband does c) At least 1 person of married couple will watch the show 16. A town has 2 fire engines operating independently. The probability that a specific fire engine is available when needed is 0.96. a) What is the probability that neither is available when needed? b) What is the probability that a fire engine is available when needed? 17. If the probability that Tom will be alive in 20 years is 0.7 and the probability that Nancy will be alive in 20 years is 0.9, what is the probability that neither will be alive in 20 years