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I've completed all the regions of the diagram for you. I started in the centre, where all three loops overlap, writing in 2% for the numbers who read all three newspapers.
Then I worked outwards, filling in the 6%, 2% and 3%, bearing in mind that we've already located 2% in the centre, thus subtracting this 2% from the figures that are given who read two newspapers.
Then, again by subtraction, I filled in the 9%, 6% and 7%; and finally, by subtracting the total so far found from 100%, I filled in the 65% who don't read any of these.
So there's your answer to (a): 65%. Can you work out how to complete the remainder of the questions?