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Step-by-step explanation:
To create a simple electromagnet, you'll need a source of electricity, a conductor, and metal. Wrap insulated copper wire tightly around an iron screw or nail before connecting the wire to a battery, and watch as your new electromagnet picks up small metal objects.
Well in order for someone to solve this they would need the function that goes with it. If you just have those then I believe you would just say:
f(0.5)
