$($a$)$ How many $4-$sequences on $\{0.\mathrm{.}9\}$ are there?

$($b$)$ How many $4-$sequences on $\{0.\mathrm{.}9\}$ do not begin with $0?$

$($c$)$ How many $4-$sequences on $\{0.\mathrm{.}9\}$ begin and end with $0?$

$($d$)$ How many $4-$sequences on $\{0.\mathrm{.}9\}$ do not begin and end with $0?$

$($e$)$ How many $4-$sequences on $\{0.\mathrm{.}9\}$ do not begin or end with $0?$

Help me part d and e$,$ i dont understand the difference between 'and' and $\text{'}$or$\text{'}$ here. Does it give the same answer for both?