Let o() : R + R be a scalar function and apply elementwise to its input vectors (called activation function in the deep learning). Denote o'() as its derivative function. Assume f(W) = 51 ||0 (Wx;) Y; || where xj R", Y; E RM are given data and W ERmxn. Compute Vf(W). Let o() : R + R be a scalar function and apply elementwise to its input vectors (called activation function in the deep learning). Denote o'() as its derivative function. Assume f(W) = 51 ||0 (Wx;) Y; || where xj R", Y; E RM are given data and W ERmxn. Compute Vf(W)