Anet and four figures are shown: a net is shown on top. the net consists of 6 identical squares. there are 4 squares in a row, and the first square has one square above it and one below it. there are four solid figures below the net. the figure labeled 1 is a square pyramid, the figure labeled 2 is a cube, the figure labeled 3 is a rectangular prism, and the figure labeled 4 is a pyramid with a pentagonal base. which figure can be formed from the net? (input the number only.)