Fill in the blank to make the statements true.
The probability of an event which is impossible to happen is .
Fill in the blanks.
(i) Probability of an impossible event = ___
(ii) Probability of a sure event = ___
(iii) Let E be an event. Then, P(not E)= ___
(iv) P(E) + P(not E)= ___
(v) ___≤ (P) ≥___