For these problems, you are given a function f of multiple variables, and each of these variables is written as a function of more variables; your goal is to compute the partial derivatives of f with respect to these 'secondary' variables, using the partial derivative formulation of the chain rule. 8. Let T(u, v) = 2utv, and suppose u = pqvr, v = pvqr. Compute the partial derivatives Tp, Ta, Tr at the point (po, go, ro) = (2, 1, 4). (Your final answer should be three numbers.) In the next problem, you will compute some partial derivatives using both languages for the chain rule, to compare them