7. Let f(r,0) = arm\6. Let f(:1:,y, z) = msiu(yz) 62 and suppose :L'=rs, y=r2+32, z=rs. Compute the partial derivatives of f with respect to *r' and 3. (Your answer may be written in terms of all of any, 2, r, 5; you do not need to substitute.) 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