3. This question is about Assembly: Please answer the permanency of the joining mechanisms below. Please take note of the specifics of the joining mechanisms and part materials listed. Points will only be awarded to correct explanation of 'why' a joining mechanism is permanent or non-permanent. [8 points] Joining Mechanism Permanent (P) or Non-permanent (NP)? Why (P) or (NP)? (Must fit into space allocated below). Please circle your answer: Mechanical fastening by rivets of metal parts NP Adhesive bonding of ceramic parts Please circle your answer: NP or Please circle your answer: Friction welding of plastic parts NP or Soldering of mechanical metal parts Please circle your answer: NP or