4. Let A be the set of citizens of the United States and let be the function that anauzea, to each citizen, the number of letters in the first name. For each item below, indicate
the type of object that the item is. For example, is the item a number, a name,
person, a function, etc.

What’s type of object is f(c)?

If f(c) = d what type of object is c

What type of object is 3+f(c)?