Suppose an Artist Always Paints Rectangular Pictures Using a Square

Essay

Suppose an artist always paints rectangular pictures using a square of unknown length as a reference.She always makes the length 4 units longer than the square,and the width is 2 units longer than the square.
(a)Write a function l(x)for the length of a painting as a function of the length of the square.
(b)Write a function a(x)for the area of a painting as a function of the length of the square.
(c)Write a function
(x)for the ratio of the length to the area as a function of the length of the square.