WHO is excited about giving a vaccine for preventing Covid'iQ virus as the chance of a person being successfully prevented by it is very high. The probability of a person being successfully prevented by the vaccine is 80%. The vaccine is given to 20 persons. 1.The situation follows binomial distribution. State 2 binomial characteristics in the context of problem. (2 MARKS) 2. Find the probability of more than 12 persons being successfully prevented by the vaccine. (4 MARKS) 3.lf 150 persons is about to take part in the vaccination program with the probability of a person being successfully prevented by the vaccine is 96%, what is the probability that at most nine persons were being unsuccessfully prevented by it? Use a suitable approximation. (4 MARKS)