Probability of an impossible event will be always ______.
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) ≥___