3. [CLO3, C3, PLO7] Review the gradient descent method. We require that this problem can only be tackled by gradient descent method. Here is a Quadrilateral (292) with 4 edges, the lengths of which are denoted as a, b, c and d, sequentially. Please design the algorithm to find the maximum area over all the possible four vertices. [6 marks) Objective/Target: [3 marks] Formulate the optimisation problem with gradient descent method. [3 marks] 3. [CLO3, C3, PLO7] Review the gradient descent method. We require that this problem can only be tackled by gradient descent method. Here is a Quadrilateral (292) with 4 edges, the lengths of which are denoted as a, b, c and d, sequentially. Please design the algorithm to find the maximum area over all the possible four vertices. [6 marks) Objective/Target: [3 marks] Formulate the optimisation problem with gradient descent method. [3 marks]