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HELP!!!! When a cell phone charger (transformer) is plugged into a household 120V AC electrical outlet, it charges an iphone by delivering 5V DC electricity

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When a cell phone charger (transformer) is plugged into a household 120V AC electrical outlet, it charges an iphone by delivering 5V DC electricity and using 5W of electrical power. If the internal transformer has a primary coil with 240 turns of wire, find... a) The number of turns on the transformer's secondary coil. b) The input current of the transformer in milliamps (mA). c) The output current of the transformer in milliamps (mA). d) The power used from the electrical outlet in watts (W)

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