The following table shows the number of respondents and their reponses, as 'Yes' or 'No', regarding ever use of the three brands of toothpaste. Colgate Close-up Mint-O Number of respondents Yes Yes Yes 75 Yes Yes No 65 Yes No Yes 80 Yes No No. 55. No - Yes Yes 40 No Yes No 45 No No Yes 30 No No No 10 Make necessary set notations, draw venn diagram of this problem and answer the following questions: What percentage of the total consumers under survey has ever used colgate? b. How many consumers have ever used exactly one of these three brands? What percentage ever used colgate or close-up but not mint-o? a. c.