(b) Create an anonymous function (with only one input ) that calculates the gra- dient Vf(x, y). The gradient is given by the following formula Vf (x, y) = 4x3 - 42x + 4xy + 2y2 - 14 4y3 - 26y + 4xy + 2a2 - 22 (2) Recall that the gradient of f should be zero at a local minimum. Calculate Vf(x, y) at the x and y values found in part (a) and save the 2-norm to the variable A4. In other words, if you found (x, y) = (x1, y1) above, save IIV f (21, y1) | |2 to the variable A4. The 2-norm is calculated in MATLAB via norm and in python via np . linalg . norm