ninety customers of a discount store were asked about their purchases during the past month.20 said they had purchased books,45 had purchased film,38 had purchased jewellery,15 had purchased books and films,8 had purchased books and jewellery,6 had purchased film and jewellery,3 had purchased all the 3 articles.draw a venn diagram and answer the questions how many of these ppl had purchased a)books or films but not jewellery? b)books and film but not jewellery? c)jewellery but not books or films? d)at least one of the three articles? e)exactly one of the three articles?