i) Given integers -1 and +1

Integers between -1 and 1 is 0.
ii) Given integers -5 and 0

Integers between -5 and 0 are -4, -3, -2, -1.
iii) Given, integers -6 and -8

Integers between -6 and -8 is -7.
iv) Given integers 0 and -3

Integers between 0 and -3 are -1, -2.