Let a simple two layer neural network be defined as:

z = W(1)x

h = ReLU(z)

y = W(2)h

Find dJ/dW(1).

To solve this question please find the above using backpropagation making sure that all matrices are correctly transposed or not. Note that the input x is a 3x1 matrix, y is a 3x1 matrix and each of the two weight matrices W(1) and W(2) are 3x3 matrices.