Write the number that comes before, after, and between.

Here are the numbers that complete the sequences:

IV. Write the number that comes before.

*a) The number before 5 is $\boxed{\text{4}}$

*b) The number before 10 is $\boxed{\text{9}}$

*c) The number before 12 is $\boxed{\text{11}}$

*d) The number before 15 is $\boxed{\text{14}}$

*e) The number before 19 is $\boxed{\text{18}}$

V. Write the number that comes after.

*a) The number after 8 is $\boxed{\text{9}}$

*b) The number after 17 is $\boxed{\text{18}}$

*c) The number after 24 is $\boxed{\text{25}}$

*d) The number after 33 is $\boxed{\text{34}}$

*e) The number after 42 is $\boxed{\text{43}}$

VI. Write the number that comes between.

*a) The number between 4 and 6 is $\boxed{\text{5}}$

*b) The number between 11 and 13 is $\boxed{\text{12}}$

*c) The number between 23 and 25 is $\boxed{\text{24}}$

*d) The number between 31 and 33 is $\boxed{\text{32}}$

*e) The number between 44 and 46 is $\boxed{\text{45}}$