$2$ Calculating the emf due to a time$-$dependent magnetic field

A square loop of wire, with sides of length $a,$ lies in the xy plane, centered at the origin. In this region, there is a nonuniform time$-$dependent magnetic field $B(y,t)=k{y}^3{t}^2$hat$(z)($where $k$ is a constant$).$ Find the emf induced in the loop.