The following construction workers help in building a house:
1. Mason builds up the house and completes the framework. (0.5 marks)
2. Carpenter builds the furniture and windows for the house.(0.5 marks)
3. Plumber fixes all the pipelines and tap fittings.(0.5 marks)
4. Electrician fixes the wires and electrical fittings of the house.(0.5 marks)