(1 point) A study of American girls ages 4-13 in the 90'\" percentile according to their height found that their height h (in cm) as a function of their age a (in years) satisfies the equation h(a) = 6.46:1 + 82.1. The same study found that their weight W (in g) as a function of their height is given by W(h) = 0.0305h2'83. a. What is a rate of growth in height? Rate of Growth = 555 cm/yr b. Write an expression for the composite function that gives the weight as a function of age. W(a) = EEE Differentiate this function to find W'(a) using the chain rule. til ::: da _ "' c. What is the rate of change in weight at ages 8 and 12? dW "' / r da _"' g y a=8 dW _ III g/yr dd 11:12 _