++++ ++++ ++++ ++++ ++++ Concept Question ++++ ++++ ++++ ++++ ++++ How many quadrature points do you need to integrate exactly the sti?ness matrix of a 1D ?nite element with quadratic interpolation for the displacements? Gauss’ method ? 1. m = 1 2. m = 2 3. m = 3 1. ++++ Statement (1) 2. ++++ Statement (2) 3. ++++ Statement (3) 4. ++++ None of the above statements 5. ++++ DKDU The correct answer is ++++