Juanita wishes to have a rectangular garden in her backyard with an area of 72 ft2. Find the dimensions of the garden that will minimize the amount of fencing needed. Round your answer to two decimal places, if necessary. Let x be the width (in ft) of the garden, and y be the length (in ft) of the garden. X = it Complete the following parts. (a) Give a function f in the variable x for the quantity to be optimized. f ( x ) = (b) State the domain of this function. (Enter your answer using interval notation.) (c) Give the formula for y in terms of x. y =