Identify \(\text{every}~\text{card}\) with area \(54~\text{square}~\text{units}\).

Card 1: a rectangle with length \(13~\text{units}\) and width \(4~\text{units}\)
Card 2: a triangle with base \(18~\text{units}\) and height \(6~\text{units}\)
Card 3: a parallelogram with base \(9~\text{units}\) and height \(6~\text{units}\)
Card 4: a trapezoid with bases \(7~\text{units}\) and \(11~\text{units}\) and height \(6~\text{units}\)
Card 5: a composite figure made from a \(6\text{-}by-5\) rectangle and a triangle with base \(8~\text{units}\) and height \(6~\text{units}\)
Card 6: a rectangle with length \(9~\text{units}\) and width \(6~\text{units}\)
Card 7: a triangle with base \(12~\text{units}\) and height \(9~\text{units}\)
Card 8: a trapezoid with bases \(6~\text{units}\) and \(12~\text{units}\) and height \(5~\text{units}\)