$\begin{array}{1 1} \text{(1) If the side of a square is not doubled, then its area does not increase four times.} \\ \text{(2) If the area of a square increases four times, then its side is doubled.}\\ \text{(3) If the area of a square increases four times, then its side is not doubled.} \\ \text{(4) If the area of a square does not increase four times, then its side is not doubled.} \end{array} $