Identify the correct combination of true and false of the given three statements.

STATEMENT-1: Work is a scalar quantity so it does not depend on direction of the force involved.

STATEMENT-2: At the point of stable equilibrium $\frac{d^2U}{dx^2}$ must be positive. (Here $U$ is potential energy)

STATEMENT-3: At the point of equilibrium $\frac{dU}{dx}$ must be zero.