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Which of the following are true about denoting properties?

Generally, lowercase letters are used for intensive properties $($with pressure and temperature being the obvious exceptions$).$

Generally, uppercase letters are used to denote extensive properties $($with mass being a major exception$).$

Generally, lower case letters are used to denote extensive properties $($with mass being a major exception$),$

Generally, upper case letters are used for intensive properties $($with pressure and temperature being the obvious exceptions$).$