How many unique IDs exist? $($NOTE: You should also count the ID consisting of all zeros$)$

$10^8+1$

B$)$ If only IDs divisible by $2$ are allowed, how many unique IDs exist?

$10^7*5$

C$)$ If only IDs divisible by $9$ are allowed, how many unique IDS exist?

D$)$ If only IDs divisible by $9$ and $2$ are allowed, how many unique IDs exist?

E$)$ If only IDs divisible by $9$ or $2$ are allowed, how many unique IDs exist?