5. Let L be a language where c, d are symbols for constants. f, are symbols for bynary functions, g is a symbol for a function of arity 1, R is a symbol for a binary relation. Which of the following are terms? (if it is, exhibit a term calculation, if not, argue why not) a) x. (b) c (c) f (x) (d) f (x, g (y)) (e) f (x,g (y))-z (f) h (f (x, x), f (y, y)) (g) g (c, d)