Add statements in main method to declare following variables, which of the

identifiers are valid? If it is valid, leave the declaration statement in code. If

it is not valid, comment it out, and write a comment to explain what is

wrong with this identifier.

Declare $3$ double variables with following identifier:

A

$2$ndltem

sales&profit

Declare $3$ long variables with following identifier:

int

Int

TAX$\_$RATE

Declare $2$ boolean variables with following identifier:

isLetterChar

Char