What is a variable? A variable must have a valid name and data type. T or F T or F: The following code is a valid definition of a variable: int main $=5$; T or F: The following code is a valid definition of a variable: int variable $=5$; int Variable $=5$; T or F: An identifier is a name that we assign to variables, constants, functions, classes etc. What are keywords in C$++?$ Final Review CMPR $120-$ Spring $2024$ Week : $16$ In programming, the terms $$line$$ and $$statement$$ always mean the same thing. T or F