a) Among 95 people of a community, it was surveyed that the ratio of the number of people who drink tea and coffee is 4:5, whereas 10 people drink tea but 15 do not drink either tea or coffee. Based on the information, answer the following questions: i) Show the information in a Venn-diagram. ii) Find the number of people who drinks exactly one of tea or coffee. iii) Find the number of people who drinks at least one; either tea or coffee.