Frigidaire stove: Do I need burners or switches or both?

Appliance Parts
1

Frigidaire Glass Stove Top

Model# FCRE3052ABC

Front left large “quick boil” burner only runs on high, it won’t regulate temperature. What part do I need?

Front Right Double Burner (small inside burner with larger rim burner). Small burner won’t heat at all. Outer rim larger burner only runs high, it won’t regulate temperature. What parts do I need?

2

Front left needs the switch, the Front right sounds like it needs the element