What is used in $DNA$ fingerprinting?

Who developed $DNA$ fingerprinting?

Arrange the various steps of $DNA$ fingerprinting technique in the correct order.
$(I)$ Separation of $DNA$ fragment by electrophoresis.
$(II)$ Digestion of $DNA$ by restriction endonucleases.
$(III)$ Hybridization using labeled $VNTR$ probe.
$(IV)$ Isolation of $DNA$.
$(V)$ Detection of hybridized $DNA$ fragments by autoradiography.
$(VI)$ Transferring of separated $DNA$ fragment to synthetic membranes.

The $DNA$ fingerprint pattern of a child is:

Give scientific reasons: $DNA$ polymorphism is the basis of genetic mapping of human genome.

Alec Jeffreys used $ . . . . . . $ as a genetic marker.