$5\mathrm{.}0\mathrm{.}1.$ Calculate the gradient of f with respect to x and y using the backpropagation algorithm

$5\mathrm{.}0\mathrm{.}2.$ Calculate the gradient of f with respect to x and y using the computation graph in tensorflow

Declare intermediate variables, $,,$ and so on$.$ Remember to use dfdx $+=(+=$ is needed when x is used in multiple paths of the computation$),$ similarly dfdy$.$