Explain the following as regards the solar heater:
![SekphycP1q11a](https://www.easyelimu.com/images/mockpastpapers/sukellemo_2020/SekphycP1q11a.PNG)
- Why the pipe is fixed to a dark-coloured collector plate.
- Why the pipe is made of copper
- Why the pipe is coiled several times
- Why the collector plate is fixed to an insulator
- Why the panel front is covered with glass.