Problem 1 (Practice of scalar‐based backpropagation). You are required to
calculate the gradients of , with respect to xi and wi.
(a) Use computational graph for calculation
(b) Based on(a), write a program to implement the computational graph and verify your answer in (a).
Note: You are free to choose the inputs of your computational graph.
Problem 2 (Practice of vector‐based backpropagation). You are required to calculate the gradients of , ‖ ‖ with respect to xi and Wi,j. Here ‖∙‖ is the calculation of L2 loss, W is 3‐by‐3 matrix and x is 3‐by‐1 vector, and ∙ is sigmoid function that performs element‐wise sigmoid operation.
(a) Use computational graph for calculation
(b) Based on(a), write a program to implement the computational graph and verify your answer in (a). You can use vectorized approach to simply your codes.
Note: You are free to choose the inputs of your computational graph.
