26. A soft drink company produces three brands of soft drinks A,B and C . A market research group conducted a survey of 100 students and reported that 40 students buy brand B , 35 buy brand C and 10 buy only brand A, 15 students buy brands B and C , 10 students buy brands A and B , 5 students buy brands A and C but not brand B , 10 students buy brands B and C but not brand A . How many students (i) buy at least two brands of soft drinks ? (ii) Buy all three brands ? (iii) buy no soft drinks at all ? (iv) As a student what measures you take to spread awareness against soft drinks ?