code: def camel(theta):
      
      x, y = theta
      obj = 2 * x ** 2 - 1.05 * x ** 4 + x ** 6 / 6 + x * y + y ** 2
      grad = np.array([
          4 * x - 4.2 * x ** 3 + x ** 5 + y,
          x + 2 * y
      ])
      return obj, grad
docs: Three-hump camel function