Select all statements that are true for a representation invariant:

$($a$)$ Determines the domain of the matching abstraction function.

$($b$)$ Determines the range of the matching abstraction function.

$($c$)$ Indicates whether data representation is well$-$formed.

$($d$)$ Maps representation data to an abstract value.

$($e$)$ Is part of the ADT.

$($f$)$ Should be defined before ADT implementation is written.

$($g$)$ Is a function of a form Boolean $->$ Object.

$($h$)$ Allows different representation values to map to the same abstract value.

$($i$)$ Allows the same representation value to map to several different abstract values.

$($j$)$ Defines the set of valid objects.

$($k$)$ Helps interpret representation data.

$($l$)$ Helps connect implementation to specification.

$($m$)$ Is unique for any given ADT.

$($n$)$ None of the above.