Consider the following statements regarding vector calculus:1.The divergence of a vector field represents the net outward flux per unit volume from a point and indicates the presence of sources or sinks.2.The curl of a vector field measures the rotational tendency of the field and is zero for conservative fields.3.The gradient of a scalar field always results in a scalar quantity representing rate of change.4.Divergence theorem relates surface integral of a vector field over a closed surface to volume integral of divergence.Which of the above statements is/are correct?