The size of an unborn fetus of a certain species depends on its age. Data for Head circumference (H) as a function of age (t) in weeks were fitted using the formula Upper H equals negative 30.03 plus 1.703 t squared minus 0.7768 t squared log tH=−30.03 1.703t2−0.7768t2logt. (a) Calculate the rate of fetal growth StartFraction dH Over dt EndFraction dH dt. (b) Is StartFraction dH Over dt EndFraction dH dt larger early in development (say at tequals=8 weeks) or late (say at tequals=36 weeks)