Vikram is studying the square pyramid below. A square pyramid. The square base has side lengths of 34.2 inches. The triangular sides have a height of 28.4 inches and length of 33.2 inches.

To find the surface area of the pyramid, in square inches, Vikram wrote (33.2) (34.2) + 4 (one-half (34.2) (28.4)). What error did Vikram make?
He used the same expression for the area of all four lateral faces.
He used the wrong expression to represent the area of the base of the pyramid.
He used the wrong value as the height when he found the area of the lateral faces.
He used an expression for surface area that only finds the total area of three faces.