Question 3 (Total of 20 marks) 1. Write a python program to determine the minimum of below equation using gradient de- scent method. f(x,y) = -0.5+ (x + 6)/7 + (y +3.5)/3 + 0.4tan(x2 + y2) 2. Calculate the minimum of the above function and compare with the answer you obtained in part 1 3. Plot the above function in excel and prove your answer in part I and II (please include your plot). Question 3 (Total of 20 marks) 1. Write a python program to determine the minimum of below equation using gradient de- scent method. f(x,y) = -0.5+ (x + 6)/7 + (y +3.5)/3 + 0.4tan(x2 + y2) 2. Calculate the minimum of the above function and compare with the answer you obtained in part 1 3. Plot the above function in excel and prove your answer in part I and II (please include your plot)