Match each function h with the transformation it represents, where c > 0.
(a) h(x) = f (x) + c (i) A horizontal shift of f, c units to the right
(b) h(x) = f (x) - c (ii) A vertical shift of f, c units down
(c) h(x) = f (x + c) (iii) A horizontal shift of f, c units to the left
(d) h(x) = f (x − c) (iv) A vertical shift of f, c units up