(a) If the dimensions of the swimming pool are denoted by X and y, which of the following functions could be used to represent the area of the piece of property needed? 0 Am = (if) 0 A(x) = (5'13\" 0 Am = (523 0 Am = (5'13" 0 A(x) = (523 (b) What are the dimensions of the smallest piece of property on which the pool can be built? 10)(x 20) + 10)( 5)(x 10) 5000 X + 20) + 5)(x + 10) + 10)(x + 20) shorter side ft longer side ft