(a) 03) Some patients are participating in a medical experiment to test a new injection. It can be assumed that after the injection, the patients would either have side e'ects or no side effects. Moreover, research has shown that there is a probability of 0.2 that a patient would have side effects. For a sample of 7 patients, nd the probability that: (i) no patient has side effects; (3 marks) (ii) at least 1 patient has side effects; (3 marks) (iii) exactlx 3 patients have side effects. (3 marks) In a certain web site, it is found that the number of visitors arrived in a particular minute follows a Poisson distribution with an average of 5 visitors in one minute. Find, in a certain minute, the probability that there are (i) W visitors; (3 marks) (ii) more than 1 visitors