In a survey of 92 resorts, it was found that 33 had a spa. 52 had a fitness center. 15 had a spa and a fitness center. 18 had a fitness center and children's club. 37 had a children's club. 12 had a spa and children's club. 8 had all three features. Complete parts a) through e). a) How many of the resorts surveyed had only a spa?

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