PLEASE HELP ASAP!

A 3-column table with 4 rows. Column 1 is labeled a with entries 1, negative 1, negative 4, negative 6. Column 2 is labeled b with entries 2, negative 2, 1, negative 3. Column 3 is labeled Distance with entries 1 unit, X, Y, Z. A number line going from negative 7 to positive 3.

Distance is the number of units between two integers. Use number line to find the distance between each pair of integers.

X=1
Y=
Z=
I answer X but what is the other 2?