Calculate the proportion of F1 hybrid vigour retained at equilibrium for the following rotations involving hybrid sires (assume that the breeds in each sire type are present in equal proportions). Use the equation for ‘predicting equilibrium hybrid vigour in rotational crossbreeding systems that use crossbred sires’)Three-way rotation using hybrid A x B x C x D sires; E x F x G x H sires; I x J x K x L siresTwo-way rotation using hybrid A x B x C x D x E x F x G x H sires;