What do the symbols on the Samsung 4 Burner Induction Hob control panel mean?

What do the symbols on the Samsung 4 Burner Induction Hob control panel mean? 

1.    Cooking zone selectors

 

2.    Heat setting selectors

 

3.    Lock control sensor

 

4.    On/Off control sensor

 

5.    Timer control sensor

 

6.    Indicators for heat settings and residual heat

 

7.    Keep warm

 

8.    Water boiling

 

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