$"1.256$ MB memory with $8-$bit read$/$write data width and byte addressability; What does N and M equal?

$2.256$ MB memory with $32-$bit read$/$write data width and $32-$bit addressability; What does N and M equal?

$3.256$ MB memory with $32-$bit read$/$wr UP$13$ ite data width and byte addressability; What does N and M equal?

$4.256$ MB memory with $64-$bit read$/$write data width and byte addressability; What does N and M equal?"