Genetic distance between wx and v

Waxy endosperm (wx), shrunken endosperm (sh), and yellow seedling (v) are encoded by three recessive genes in corn that are linked on chromosome 5.
A corn plant homozygous for all three recessive alleles is crossed with a plant homozygous for all the dominant alleles.
The resulting F1 are then crossed with a plant homozygous for the recessive alleles in a three-point testcross.
The progeny of the testcross are:

wx	sh	V	84
Wx	Sh	v	95
Wx	Sh	V	3479
wx	sh	v	3478
Wx	sh	V	1512
wx	Sh	v	1525
wx	Sh	V	292
Wx	sh	v	284

What is the genetic distance between Wx and V?