Ostriches go through a large change in body mass as they grow from hatchlings to adults. Body mass increases 25-fold as the bird develops from a four-week hatchling to a full grown adult. The duration of a reflex loop (time from stimulus to response) depends on the distance (length) the signals have to travel and the conduction velocity of action potentials along axons. If the conduction velocity is directly proportional to the cross-sectional area of axons(A) by what factor does the cross sectional area of the axon have to increase in order to maintain a constant reflex duration as the animal grows?(B) By what factor would the cross-sectional area of axons increase under isometric scaling.