The SUMSQ function syntax has the following arguments: Number1, number2, ... Number1 is required, subsequent numbers are optional. 1 to 255 arguments for which you want the sum of the squares. You can also use a single array or a reference to an array instead of arguments separated by commas.
THEY/THEIR (SINGULAR). Using the plural pronoun to refer to a single person of unspecified gender is an old and honorable pattern in English, not a newfangled bit of degeneracy or a politically correct plot to avoid sexism (though it often serves the latter purpose).
Singular and Plural Nouns. The difference between singular and plural nouns is easy to spot. When a noun indicates one only, it is a singular noun. When a noun indicates more than one, it is plural. The following sentences contain singular nouns examples. The boy had a baseball in his hand.