The frequency distribution shown here illustrates the number of medical tests conducted on 30 randomly selected patients. Number of tested performed Number of patients 0 12 1 8 2 2 3 3 4 or more 5 If a patient selected at random, find probability the patient has had exactly 2 tests done ii) the patient has had at least 2 tests done ill) The patient has had at most 3 tests done iv) the patient has had 1 or 2 tests done