A rectangular loop of wire is placed in the $XY$-plane with its side of length $3\,\text{cm}$ parallel to the $X$-axis and the side of length $4\,\text{cm}$ parallel to the $Y$-axis. It is moving in the positive $X$-direction with speed $10\,\text{cm/s}$. A magnetic field exists in the space with its direction parallel to the $Z$-axis. The field decreases by $2 \times 10^{-3}\,\text{T/cm}$ along the positive $X$-axis and increases in time by $2 \times 10^{-2}\,\text{T/s}$. The induced emf in the wire is