clamp the fork upright in the vice. With the hacksaw, cut between the tines as deep as you can ensuring leaving about 5mm.
Flatten the whole length of the fork by hammering against a hard surface.
With the narrow nose pliers, twist the outer tines 90º and at the same time bend them out about 75º from as close to the end of your cut.
cut 1cm off the middle 2 tines and smooth the edges with the file and or emery paper
With the narrow nose pliers, twist the middle tines 90º.
With the narrow nose pliers bend the middle tines into a curve outwards turning the curve almost make a circle.
Curve the outer tines so that they are following a similar curve outside the centre tines.
Flatten the fork tines again by hammering against hard surface
Smooth out the surface with emery paper