Complete the following statements: (i) Probability of an event E + Probability of the event ‘not E’ = ________ . (ii) The probability of an event that cannot happen is ________ . Such an event is called ________ . (iii) The probability of an event that is certain to happen is ________ . Such an event is called ________ . (iv) The sum of the probabilities of all the elementary events of an experiment is ________ . (v) The probability of an event is greater than or equal to ________ and less than or equal to ________ .